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Karlstad O, Tverdal A, Skurtveit S, Nafstad P, Furu K.Karlstad O, et al.Pharmacoepidemiol Drug Saf. 2011 Apr;20(4):370-7. doi: 10.1002/pds.2101. Epub 2011 Jan 24.Pharmacoepidemiol Drug Saf. 2011.PMID: 21264987
Karlstad O, Starup-Linde J, Vestergaard P, Hjellvik V, Bazelier MT, Schmidt MK, Andersen M, Auvinen A, Haukka J, Furu K, de Vries F, De Bruin ML.Karlstad O, et al.Curr Drug Saf. 2013 Nov;8(5):333-48. doi: 10.2174/15680266113136660067.Curr Drug Saf. 2013.PMID: 24215311Free PMC article.Review.