Ghirardi, L
Brikell, I
Kuja-Halkola, R http://orcid.org/0000-0002-3765-2067
Freitag, C M
Franke, B http://orcid.org/0000-0003-4375-6572
Asherson, P
Lichtenstein, P http://orcid.org/0000-0003-3037-5287
Larsson, H
Article History
Received: 3 August 2016
Revised: 1 November 2016
Accepted: 9 January 2017
First Online: 28 February 2017
Competing interests
: BF has received educational speaking fees from Merz and Shire. PL has served as a speaker for Medice. HL has received educational speaking fees from Eli-Lilly and Shire and has received a research grant from Shire, all outside the submitted work. King’s College London research support account for Asherson received honoraria for consultancy to Shire, Eli-Lilly and Novartis; received educational/research awards from Shire, Lilly, Novartis, Vifor Pharma, GW Pharma and QbTech; and speaker’s fees at sponsored events for Shire, Lilly and Novartis. The remaining authors declare no conflict of interest.