Zanders, M M J
van Herk-Sukel, M P P
Vissers, P A J
Herings, R M C
Haak, H R
van de Poll-Franse, L V
Article History
Received: 12 March 2015
Revised: 31 May 2015
Accepted: 15 June 2015
First Online: 16 July 2015
Competing interests
: The authors declare no conflict of interest. Dr MPPvH-S and RMCH are employees of the PHARMO Database Network for Drug Outcomes Research. This independent research institute performs financially supported studies for government and related healthcare authorities and several pharmaceutical companies. This study however, is not financially supported by a pharmaceutical company.