Reinau, D
Surber, C
Jick, S S
Meier, C R
Article History
Received: 30 January 2014
Revised: 14 April 2014
Accepted: 24 April 2014
First Online: 29 May 2014
Competing interests
: CS was associated with Spirig Pharma Ltd, Egerkingen, Switzerland. He is a consultant to Galderma SA, Lausanne, Switzerland.