Lu, Ping
Villellas, Cristina
Koul, Anil
Andries, Koen
Lill, Holger
Bald, Dirk
Article History
Received: 8 May 2014
Accepted: 15 May 2014
First Online: 11 June 2014
Competing interests
: CV, KA and AK are the employees of Janssen. The remaining authors declare no conflict of interest.