Aljitawi, O S
Ganguly, S
Abhyankar, S H
Ferree, M
Marks, R
Pipkin, J D
McGuirk, J P
Article History
Received: 26 November 2013
Revised: 27 February 2014
Accepted: 11 April 2014
First Online: 9 June 2014
Competing interests
: JDP is employed by the sponsoring company Ligand Pharmaceuticals Incorporated, Lawrence, KS, USA, the remaining authors declare no conflict of interest.