Chong, V
Article History
Received: 12 June 2015
Accepted: 21 September 2015
First Online: 4 December 2015
Change Date: 9 September 2016
Change Type: Update
Change Details: This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
Competing interests
: VC is a consultant for Allergan, Bayer, Novartis, Quantel Medical, Pfenex.