Tropeano, Maria
Andrieux, Joris
Vassos, Evangelos
Collier, David A
Article History
Received: 27 January 2014
Revised: 4 April 2014
Accepted: 9 April 2014
First Online: 14 May 2014
Competing interests
: David A Collier is a full-time employee of Eli Lilly & Co Ltd and a Visiting Professor at King’s College London. The remaining authors declare no conflict of interest.