PeerJ Author 135 Points Contributions by role Author 135 Contributions by subject area Cognitive Disorders Epidemiology Pediatrics Public Health Statistics Maarit Virta PeerJ Author Summary Cognitive Disorders Neuroscience Psychiatry & Psychology Past or current institution affiliations University of Helsinki Work details University of Helsinki Institute of Behavioural Sciences PeerJ Contributions Articles 1 July 8, 2014 Attrition in a 30-year follow-up of a perinatal birth risk cohort: factors change with age Jyrki Launes, Laura Hokkanen, Marja Laasonen, Annamari Tuulio-Henriksson, Maarit Virta, Jari Lipsanen, Pentti J. Tienari, Katarina Michelsson https://doi.org/10.7717/peerj.480 PubMed 25071998
