Academic article

• Hanne Loe Kibsgaard; Maria Mathisen; Tone Kofstad et al. (2026). Microbiological sampling in lower respiratory tract infections: comparing nasopharyngeal and sputum specimens. (external link)
• Jon Anders Feet; Karl Erik Müller; Øyvind Kommedal et al. (2026). Syndromic Multiplex Polymerase Chain Reaction: The Impact on Microbial Yield in Nonventilator Hospital-Acquired Pneumonia. (external link)
• Marte Holmberg; Annika Niehrs; Olav Dalgard et al. (2026). Hepatic flares, their immune signatures, and ALT variability after nucleos(t)ide analogue cessation in HBeAg-negative hepatitis B. (external link)
• Anders Benjamin Kildal; Thor Ueland; Mohammad Reza Mirlashari et al. (2026). Serial blood serum measurements of calprotectin and deoxyribonuclease in COVID-19 patients during hospitalization and recovery until one year: a prospective, multicenter, observational study. (external link)
• Kari Otterdal; Thor Ueland; Jan Cato Holter et al. (2026). Platelet-derived mediators in hospitalized COVID-19 patients and associations to respiratory failure, ICU admittance and 60-day mortality. (external link)
• Beathe Kiland Granerud; Mari Kaarbø; Huda Al-Baldawi et al. (2025). Droplet Digital PCR or Real-Time PCR as a Method for Quantifying SARS-CoV-2 RNA in Plasma-Is There a Difference?. (external link)
• Hans-Kittil Viermyr; Kristian Tonby; Erica Ponzi et al. (2024). Safety of baricitinib in vaccinated patients with severe and critical COVID-19 sub study of the randomised Bari-SolidAct trial. (external link)
• Dagfinn Lunde Markussen; Øyvind Kommedal; Siri Tandberg Knoop et al. (2024). Microbial aetiology of community-acquired pneumonia in hospitalised adults: A prospective study utilising comprehensive molecular testing. (external link)
• Dagfinn Lunde Markussen; Sondre Serigstad; Christian Ritz et al. (2024). Diagnostic Stewardship in Community-Acquired Pneumonia with Syndromic Molecular Testing: A Randomized Clinical Trial. (external link)
• Jon Anders Feet; Karl Erik Müller; Harleen Grewal et al. (2024). A retrospective study of non-ventilator hospital-acquired pneumonia in a Norwegian hospital: a serious medical condition in need of better and timelier microbiological diagnostics. (external link)
• Andreas Barratt-Due; Kristin Pettersen; Tuva Børresdatter Dahl et al. (2024). Escalated complement activation during hospitalization is associated with higher risk of 60-day mortality in SARS-CoV-2-infected patients. (external link)
• Asgeir Johannessen; Dag Henrik Reikvam; Soo Aleman et al. (2024). Clinical trial: An open-label, randomised trial of different re-start strategies after treatment withdrawal in HBeAg negative chronic hepatitis B. (external link)
• Sarah Louise Mikalsen Murphy; Nora Reka Balzer; Trine Ranheim et al. (2024). Extracellular matrix remodelling pathway in peripheral blood mononuclear cells from severe COVID-19 patients: an explorative study. (external link)
• Munib Mesinovic; Xin Ci Wong; Giri Shan Rajahram et al. (2024). At-admission prediction of mortality and pulmonary embolism in an international cohort of hospitalised patients with COVID-19 using statistical and machine learning methods. (external link)
• Stine Grønseth; Tormod Rogne; Lars Heggelund et al. (2023). Role of fungal burden in risk stratification of HIV-negative patients with Pneumocystis pneumonia: A 12-year, retrospective, observational, multicenter cohort. (external link)
• Hans Kristian Fløystad; Jan Cato Holter; Einar Husebye et al. (2023). Nausea Predicts Bacteremia in Immunocompetent Patients with Pneumococcal Community-Acquired Pneumonia: Secondary Data Analysis from a Prospective Cohort. (external link)
• Marius Trøseid; José R. Arribas; Lambert Assoumou et al. (2023). Efficacy and safety of baricitinib in hospitalized adults with severe or critical COVID‑19 (Bari‑SolidAct): a randomised, double‑blind, placebo‑controlled phase 3 trial. (external link)
• Marius Trøseid; Jan Cato Holter; Kristian Holm et al. (2023). Gut microbiota composition during hospitalization is associated with 60-day mortality after severe COVID-19. (external link)
• Ahmed Abdelhak; Lorenzo Barba; Michele Romoli et al. (2023). Prognostic performance of blood neurofilament light chain protein in hospitalized COVID-19 patients without major central nervous system manifestations: an individual participant data meta-analysis. (external link)
• Sarah Louise Mikalsen Murphy; Bente Halvorsen; Jan Cato Holter et al. (2023). Circulating markers of extracellular matrix remodelling in severe COVID-19 patients. (external link)
• Kjersti Oppen; Cato Brede; Øyvind Skadberg et al. (2023). Hepcidin analysis in pneumonia: Comparison of immunoassay and LC-MS/MS. (external link)
• Signe Søvik; Andreas Barratt-Due; Trine Kåsine et al. (2022). Corticosteroids and superinfections in COVID-19 patients on invasive mechanical ventilation. (external link)
• William Ward Siljan; Dhanasekaran Sivakumaran; Christian Ritz et al. (2022). Host Transcriptional Signatures Predict Etiology in Community-Acquired Pneumonia: Potential Antibiotic Stewardship Tools. (external link)
• Hongchao Pan; Richard Peto; Quarraisha Abdool Karim et al. (2022). Remdesivir and three other drugs for hospitalised patients with COVID-19: final results of the WHO Solidarity randomised trial and updated meta-analyses. (external link)
• Bjørn Waagsbø; Eva Margrethe Nor Buset; Jørn-Åge Longva et al. (2022). Diagnostic stewardship aiming at expectorated or induced sputum promotes microbial diagnosis in community-acquired pneumonia. (external link)
• Eva Miranda Marwali; Aria Kekalih; Saptadi Yuliarto et al. (2022). Paediatric COVID-19 mortality: a database analysis of the impact of health resource disparity. (external link)
• Bjørn Waagsbø; Morten Tranung; Jan Kristian Damås et al. (2022). Antimicrobial therapy of community-acquired pneumonia during stewardship efforts and a coronavirus pandemic: an observational study. (external link)
• Bjørn Waagsbø; Nora Stuve; Jan Egil Afset et al. (2022). High levels of discordant antimicrobial therapy in hospital-acquired bloodstream infections is associated with increased mortality in an intensive care, low antimicrobial resistance setting. (external link)
• Sondre Serigstad; Dagfinn Lunde Markussen; Christian Ritz et al. (2022). The changing spectrum of microbial aetiology of respiratory tract infections in hospitalized patients before and during the COVID-19 pandemic. (external link)
• Esteban Garcia-Gallo; Laura Merson; Kalynn Kennon et al. (2022). ISARIC-COVID-19 dataset: A Prospective, Standardized, Global Dataset of Patients Hospitalized with COVID-19. (external link)
• Anders Aune Tveita; Sarah Louise Mikalsen Murphy; Jan Cato Holter et al. (2022). High Circulating Levels of the Homeostatic Chemokines CCL19 and CCL21 Predict Mortality and Disease Severity in COVID-19. (external link)
• Marius Trøseid; Tuva Børresdatter Dahl; Jan Cato Holter et al. (2022). Persistent T-cell exhaustion in relation to prolonged pulmonary pathology and death after severe COVID-19: Results from two Norwegian cohort studies. (external link)
• Maria Belland Olsen; Camilla Huse; Mirta Sousa et al. (2022). DNA Repair Mechanisms are Activated in Circulating Lymphocytes of Hospitalized Covid-19 Patients. (external link)
• Kjersti Oppen; Thor Ueland; Annika Elisabet Michelsen et al. (2022). Hepcidin predicts 5-year mortality after community-acquired pneumonia. (external link)
• Jason Bouziotis; Marianna Arvanitakis; Jean-Charles Preiser et al. (2022). Association of body mass index with COVID-19 related in-hospital death. (external link)
• Frauke Degenhardt; David Ellinghaus; Simonas Juzenas et al. (2022). Detailed stratified GWAS analysis for severe COVID-19 in four European populations. (external link)
• Sondre Serigstad; Christian Ritz; Daniel Faurholt-Jepsen et al. (2022). Impact of rapid molecular testing on diagnosis, treatment and management of community-acquired pneumonia in Norway: a pragmatic randomised controlled trial (CAPNOR). (external link)
• Sondre Serigstad; Dagfinn Lunde Markussen; Harleen Grewal et al. (2022). Rapid syndromic PCR testing in patients with respiratory tract infections reduces time to results and improves microbial yield. (external link)
• Sung-Min Cho; Nicole White; Lavienraj Premraj et al. (2022). Neurological manifestations of COVID-19 in adults and children. (external link)
• Bronner P. Gonçalves; Matthew Hall; Waasila Jassat et al. (2022). An international observational study to assess the impact of the Omicron variant emergence on the clinical epidemiology of COVID-19 in hospitalised patients. (external link)
• Luis Felipe Reyes; Srinivas Murthy; Esteban Garcia-Gallo et al. (2022). Respiratory support in patients with severe COVID-19 in the International Severe Acute Respiratory and Emerging Infection (ISARIC) COVID-19 study: a prospective, multinational, observational study. (external link)
• Marina Wainstein; Samual MacDonald; Daniel Fryer et al. (2022). Use of an extended KDIGO definition to diagnose acute kidney injury in patients with COVID-19: A multinational study using the ISARIC–WHO clinical characterisation protocol. (external link)
• Quirin Hammer; Josefine Dunst; Wanda Christ et al. (2022). SARS-CoV-2 Nsp13 encodes for an HLA-E-stabilizing peptide that abrogates inhibition of NKG2A-expressing NK cells. (external link)
• Mari E.K. Niemi; Juha Karjalainen; Rachel G. Liao et al. (2021). Mapping the human genetic architecture of COVID-19. (external link)
• Trine Kåsine; Anne Margarita Dyrhol Riise; Andreas Barratt-Due et al. (2021). Neutrophil count predicts outcome in hospitalized COVID-19 patients. Results from the NOR-Solidarity trial. (external link)
• Sheryl Ann Abdukahil; Ryuzo Abe; Laurent Abel et al. (2021). COVID‐19 symptoms at hospital admission vary with age and sex: results from the ISARIC prospective multinational observational study. (external link)
• Sheryl Ann Abdukahil; Ryuzo Abe; Laurent Abel et al. (2021). Ten months of temporal variation in the clinical journey of hospitalised patients with COVID-19: An observational cohort. (external link)
• Luis Felipe Reyes; Srinivas Murthy; Esteban Garcia-Gallo et al. (2021). Clinical characteristics, risk factors and outcomes in patients with severe COVID-19 registered in the ISARIC WHO clinical characterisation protocol: a prospective, multinational, multicentre, observational study. (external link)
• Thor Ueland; Anne Ma Dyrhol-Riise; Bjørn Martin Woll et al. (2021). Increased inflammatory markers reflecting fibrogenesis are independently associated with cardiac involvement in hospitalized COVID-19 patients. (external link)
• Anne Hege Aamodt; Einar August Høgestøl; Trine Haug Popperud et al. (2021). Blood neurofilament light concentration at admittance: a potential prognostic marker in COVID-19. (external link)
• Odd Brustugun; Lars Heggelund (2021). Koronavaksinering av kreftpasienter. (external link)
• Kjersti Oppen; Thor Ueland; William Ward Siljan et al. (2021). Hepcidin and ferritin predict microbial etiology in community-acquired pneumonia. (external link)
• Andreas Barratt-Due; Inge Christoffer Olsen; Katerina Nezvalova-Henriksen et al. (2021). Evaluation of the Effects of Remdesivir and Hydroxychloroquine on Viral Clearance in COVID-19 : A Randomized Trial. (external link)
• Hedda Benedicte Hoel; Lars Heggelund; Dag Henrik Reikvam et al. (2020). Elevated markers of gut leakage and inflammasome activation in COVID-19 patients with cardiac involvement. (external link)
• Marthe Jøntvedt Jørgensen; Jan Cato Holter; Erik Christensen et al. (2020). Increased interleukin-6 and macrophage chemoattractant protein-1 are associated with respiratory failure in COVID-19. (external link)
• Thor Ueland; Lars Heggelund; Andreas Lind et al. (2020). Elevated plasma sTIM-3 levels in patients with severe COVID-19. (external link)
• Jan Cato Holter; Soeren Pischke; Eline de Boer et al. (2020). Systemic complement activation is associated with respiratory failure in COVID-19 hospitalized patients. (external link)
• William Ward Siljan; Jan Cato Holter; Annika Michelsen et al. (2019). Inflammatory biomarkers are associated with aetiology and predict outcomes in community-acquired pneumonia: Results of a 5-year follow-up cohort study. (external link)
• William Ward Siljan; Jan Cato Holter; Ståle Haugset Nymo et al. (2018). Low levels of immunoglobulins and mannose-binding lectin are not associated with etiology, severity, or outcome in community-acquired pneumonia. (external link)
• Olav Dalgard; Ola Weiland; Geir Noraberg et al. (2017). Sofosbuvir based treatment of chronic hepatitis C genotype 3 infections - A Scandinavian real-life study. (external link)
• William Ward Siljan; Jan Cato Holter; Ståle Haugset Nymo et al. (2017). Cytokine responses, microbial aetiology and short-term outcome in community-acquired pneumonia. (external link)
• Håvard Midgard; Benedikte Bjøro; Arild Mæland et al. (2016). Hepatitis C reinfection after sustained virological response. (external link)
• Jan Cato Holter; Thor Ueland; Jon Norseth et al. (2016). Vitamin D Status and Long-Term Mortality in Community-Acquired Pneumonia: Secondary Data Analysis from a Prospective Cohort. (external link)
• Jan Cato Holter; Thor Ueland; Pål Jenum et al. (2016). Risk factors for long-term mortality after hospitalization for community-acquired pneumonia: a 5-year prospective follow-up study. (external link)
• Lars Heggelund; Peter Gaustad; Othilde Else Håvelsrud et al. (2015). Corynebacterium pseudotuberculosis Pneumonia in a veterinary stuent infected during lobaratory work. (external link)
• Jan Cato Holter; Fredrik Müller; Ola Bjørang et al. (2015). Etiology of community-acquired pneumonia and diagnostic yields of microbiological methods: a 3-year prospective study in Norway. (external link)
• Nadine Durema Pullar; Harald Otto Steinum; Kristian Tonby et al. (2014). Low prevalence of positive interferon-gamma tests in HIV-positive long-term immigrants in Norway. (external link)
• Einar Dale; Lars Heggelund; Helvi Holm Samdal et al. (2010). Dramatisk sykehistorie forårsaket av uvanlig bakterie. (external link)
• JK Damas; L Landro; B Fevang et al. (2009). Homeostatic chemokines CCL19 and CCL21 promote inflammation in human immunodeficiency virus-infected patients with ongoing viral replication. (external link)
• Jan Kristian Damås; Linn Aina Ysland Landrø; Børre Fevang et al. (2009). Enhanced levels of the CCR7 ligands CCL19 and CCL21 in HIV infection: correlation with viral load, disease progression and response to highly active antiretroviral therapy. (external link)
• Linn Aina Ysland Landrø; Jan Kristian Damås; Bente Halvorsen et al. (2009). CXCL16 in HIV infection - a link between inflammation and viral replication. (external link)
• Linn Aina Ysland Landrø; L Landro; Jan Kristian Damås et al. (2008). Decreased serum lipocalin-2 levels in human immunodeficiency virus-infected patients: increase during highly active anti-retroviral therapy. (external link)
• L Heggelund; H Holm Samdal; R Eggum et al. (2007). Severe case of invasive community-acquired methicillin-resistant Staphylococcus aureus infection in Norway. (external link)
• Kirsten Bjørklund Holven; Jan Kristian Damås; Arne Yndestad et al. (2006). Chemokines in children with heterozygous familiar hypercholesterolemia - Selective upregulation of RANTES. (external link)
• Arnt E Fiane; Thor Ueland; Svein Simonsen et al. (2005). Low mannose-binding lectin and increased complement activation correlate to allograft vasculopathy, ischaemia, and rejection after human heart transplantation. (external link)
• Børre Fevang; Tom Eirik Mollnes; Are Martin Holm et al. (2005). Common variable immunodeficiency and the complement system; low mannose-binding lectin levels are associated with bronchiectasis. (external link)
• Lars Heggelund; Tom Eirik Mollnes; Terje Espevik et al. (2005). Modulatory effect of mannose-binding lectin on cytokine responses: possible roles in HIV infection. (external link)
• L Heggelund; TE Mollnes; Terje Espevik et al. (2005). Modulatory effect of mannose-binding lectin on cytokine responses: roles in HIV infection. (external link)
• L Heggelund; TE Mollnes; Terje Espevik et al. (2005). Modulatory effect of mannose-binding lectin on cytokine resposes: possible roles in HIV infection. (external link)
• L Heggelund; F Muller; E Lien et al. (2004). Increased expression of Toll-like receptor 2 on monocytes in HIV infection: Possible roles in inflammation and viral replication. (external link)
• L Heggelund; Jan Kristian Damås; JK Damas et al. (2004). Stimulation of toll-like receptor 2 in mononuclear cells from HIV-infected patients induces chemokine responses: possible pathogenic consequences. (external link)
• Lars Heggelund; T Flo; K Berg et al. (2004). Soluble toll-like receptor 2 in HIV infection: association with disease progression. (external link)
• L Heggelund; Trude Helen Flo; K. Berg et al. (2004). Soluble toll-like receptor 2 in HIV infection: association with disease progression. (external link)
• Eva Stylianou; Vigdis Bjerkeli; Arne Yndestad et al. (2003). Raised serum levels of interleukin-18 is associated with disease progression and may contribute to virological treatment failure in HIV-1-infected patients. (external link)
• Lars Heggelund; Tom Eirik Mollnes; Thor Ueland et al. (2003). Mannose-Binding Lectin in HIV Infection: Relation to Disease Progression and Highly Active Antiretroviral Therapy. (external link)
• Arnt E Fiane; Vibeke Videm; PS Lingaas et al. (2003). Mechanism of complement activation and its role in the inflammatory response following thoraco-abdominal aortic aneurys. (external link)
• Arnt E. Fiane; Vibeke Videm; Per Snorre Lingaas et al. (2003). Mechanism of complement activation and its role in the inflammatory response after thoracoabdominal aortic aneurysm repair. (external link)

Academic literature review

• Jon Anders Feet; Lars Heggelund; Karl Erik Müller (2026). Non-ventilator hospital-acquired pneumonia diagnostic procedures: A systematic review. (external link)

Conference abstract

• William Ward Siljan; Jan Cato Holter; Annika Elisabet Michelsen et al. (2018). Procalcitonin has wider applicability in community-acquired pneumonia than other biomarkers. (external link)

Conference lecture

• Hanne Loe Kibsgaard; Lars Heggelund; Maria Mathisen et al. (2026). Microbiological diagnostic practice and antibiotic treatment in management of acute exacerbations of chronic obstructive pulmonary disease. (external link)
• Lars Heggelund (2025). What studies are urgently needed and where do we go from here?. (external link)
• Lars Heggelund; Samuel Rhedin; Pontus Noucler (2025). Can diagnostics be used to streamline the treatment of respiratory infections. (external link)
• Asbjørg Stray-Pedersen; P Garred; Lars Heggelund et al. (2003). A boy with severe pulmonal infectious problems due to NKX2.1 haploinsufficiency and mannan-binding lectin deficiency. (external link)

Conference poster

• Hanne Loa Kibsgaard; Lars Heggelund; Tone Kofstad et al. (2024). Diagnostic yield in lower respiratory tract infections; comparing nasopharyngeal swabs with sputum samples. (external link)
• Jon Anders Feet; Karl Erik Müller; Lars Heggelund (2024). Ventilator-associated pneumonia in a Norwegian hospital: A retrospective cohort. (external link)
• Asbjørg Stray-Pedersen; C. Lindman; Lauritz Stoltenberg et al. (2002). A boy with neurologic abnormalities, subclinical hypothyroidism, respiratory distress and immunodeficiency due to microdelition of chromosome 14q12 and NKX2.1 haploinsufficiency. (external link)

Doctoral thesis (PhD)

• Lars Heggelund (2005). Innate immunity and human immunodeficiency virus infection: studies on toll-like receptor 2 and mannose-binding lectin. (external link)

Journal corrigendum

• Dagfinn Lunde Markussen; Øyvind Kommedal; Siri Tandberg Knoop et al. (2024). Corrigendum to “Microbial aetiology of community-acquired pneumonia in hospitalised adults: A prospective study utilising comprehensive molecular testing” [International Journal of Infectious Diseases 143 (2024) 107019]. (external link)

Lecture

• Lars Heggelund (2026). The need for respiratory sampling in primary care – a discussion. (external link)

Letter to the editor

• Thor Ueland; Lauri A.O. Äikäs; Tuva Børresdatter Dahl et al. (2023). Low-density lipoprotein particles carrying proinflammatory proteins with altered aggregation pattern detected in COVID-19 patients 3 months after hospitalization. (external link)
• Ida Gregersen; Thor Ueland; Jan Cato Holter et al. (2022). CXCL16 associates with adverse outcome and cardiac involvement in hospitalized patients with Covid-19. (external link)
• Thor Ueland; Jan Cato Holter; Aleksander Rygh Holten et al. (2020). Distinct and early increase in circulating MMP-9 in COVID-19 patients with respiratory failure: MMP-9 and respiratory failure in COVID-19. (external link)
• William Siljan; Jan Cato Holter; Ståle Haugset Nymo et al. (2016). Circulating cell-free DNA is elevated in community-acquired bacterial pneumonia and predicts short-term outcome. (external link)
• Ørjan Samuelsen; Carina Thilesen; Lars Heggelund et al. (2011). Identification of NDM-1-producing Enterobacteriaceae in Norway. (external link)

See a complete overview of publications in NVA.