Wolley, M J
Pimenta, E
Calhoun, D
Gordon, R D
Cowley, D
Stowasser, M
Article History
Received: 22 November 2016
Revised: 17 January 2017
Accepted: 22 February 2017
First Online: 6 April 2017
Competing interests
: EP is an employee of Bayer Pharma; however, this article reflects the views of the author and should not be construed to represent Bayer Pharma views or policies of its affiliates or its employees. The remaining authors declare no conflict of interest.