Received: 15 February 2018
Revised: 11 June 2018
Accepted: 24 July 2018
First Online: 31 August 2018
Compliance with ethical standards
: OAA received speaker’s honorarium from Lundbeck. JCS has participated in research funded by BMS, Forest, Merck, Elan, J&J consulted for Astellas and has been a speaker for Pfizer, Abbott and Sanofi. TE has received honoraria for lecturing from GlaxoSmithKlein, Pfizer, and Lundbeck. EV has received grants and served as consultant, advisor or speaker for the following entities: AB-Biotics, Allergan, Angelini, Dainippon Sumitomo Pharma, Farmindustria, Ferrer, Gedeon Richter, Janssen, Johnson and Johnson, Lundbeck, Otsuka, Pfizer, Roche, Sanofi-Aventis, Servier, the Brain and Behavior Foundation, the Seventh European Framework Programme (ENBREC), the Stanley Medical Research Institute, Sunovion, and Takeda. The remaining authors declare that they have no conflict of interest.