Open Access. The accepted version of this article has been reproduced here according to the publisher's policies.
This version may be downloaded for personal use only. Permission to reproduce this article must be sought from Springer. This is the accepted manuscript of an article published by Springer in Social Psychiatry and Psychiatric Epidemiology, 51(9): 1257-1264, 2016. The final publication is available at Springer via http://dx.doi.org/10.1007/s00127-016-1215-6 (Please note: access via this link may only be available with a subscription)
Copyright (2016) Springer
Social Psychiatry and Psychiatric Epidemiology, 51(9): 1257-1264