Øystein Karlstad

Arterial events, venous thromboembolism, thrombocytopenia, and bleeding after vaccination with Oxford-AstraZeneca ChAdOx1-S in Denmark and Norway: population based cohort study

Anton Pottegård, Lars Christian Lund, Øystein Karlstad et al. · BMJ · 2021 · 431 citations · Full text

Medicine, Hematology, Immunology +17

Trends in attention-deficit hyperactivity disorder medication use: a retrospective observational study using population-based databases

Sudha R. Raman, Kenneth K. C. Man, Shahram Bahmanyar et al. · The Lancet Psychiatry · 2018 · 312 citations · Full text

Pharmacy, Pharmacotherapy, Psychiatry +14

Association Between Methylphenidate and Amphetamine Use in Pregnancy and Risk of Congenital Malformations

Krista F. Huybrechts, Gabriella Bröms, Lotte Brix Christensen et al. · JAMA Psychiatry · 2017 · 142 citations · Full text

Medicine, Maternal Health, Obstetrics +17

Association Between Antibiotics in the First Year of Life and Celiac Disease

Stine Dydensborg Sander, Anne‐Marie Nybo Andersen, Joseph A. Murray et al. · Gastroenterology · 2019 · 106 citations · Full text

Medicine, Immunology, Pediatrics +10

Prenatal and infant paracetamol exposure and development of asthma: the Norwegian Mother and Child Cohort Study

Maria C. Magnus, Øystein Karlstad, Siri E. Håberg et al. · International Journal of Epidemiology · 2016 · 96 citations · Full text

Public Health, Maternal Health, Pediatrics +13