Article History
Received: 22 January 2016
Revised: 15 June 2016
Accepted: 16 June 2016
First Online: 9 August 2016
Competing interests
: LVK has within the preceding 3 years been a consultant for Lundbeck and AstraZeneca. MV has within the preceding 3 years been a consultant for Servier, AstraZeneca and Lundbeck. The remaining authors declare no conflict of interest.