Article History
Received: 4 February 2014
Revised: 23 April 2014
Accepted: 6 June 2014
First Online: 7 August 2014
Competing interests
: GBB is in the advisory board and clinical trial, and is speaker and stock holder in Coloplast, JNJ, Pfizer, Lilly, GSK, Abbott, AMS and Astellas. The remaining authors declare no conflict of interest.