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Validation study in four health-care databases: upper gastrointestinal bleeding misclassification affects precision but not magnitude of drug-related upper gastrointestinal bleeding risk.
Valkhoff VE, Coloma PM, Masclee GM, Gini R, Innocenti F, Lapi F, Molokhia M, Mosseveld M, Nielsson MS, Schuemie M, Thiessard F, van der Lei J, Sturkenboom MC, Trifirò G; EU-ADR Consortium. Valkhoff VE, et al. Among authors: nielsson ms. J Clin Epidemiol. 2014 Aug;67(8):921-31. doi: 10.1016/j.jclinepi.2014.02.020. Epub 2014 May 1. J Clin Epidemiol. 2014. PMID: 24794575
Identification of acute myocardial infarction from electronic healthcare records using different disease coding systems: a validation study in three European countries.
Coloma PM, Valkhoff VE, Mazzaglia G, Nielsson MS, Pedersen L, Molokhia M, Mosseveld M, Morabito P, Schuemie MJ, van der Lei J, Sturkenboom M, Trifirò G; EU-ADR Consortium. Coloma PM, et al. Among authors: nielsson ms. BMJ Open. 2013 Jun 20;3(6):e002862. doi: 10.1136/bmjopen-2013-002862. BMJ Open. 2013. PMID: 23794587 Free PMC article.
Mortality in elderly ICU patients: a cohort study.
Nielsson MS, Christiansen CF, Johansen MB, Rasmussen BS, Tønnesen E, Nørgaard M. Nielsson MS, et al. Acta Anaesthesiol Scand. 2014 Jan;58(1):19-26. doi: 10.1111/aas.12211. Epub 2013 Oct 13. Acta Anaesthesiol Scand. 2014. PMID: 24117049