Wilson, M E
O’Halloran, H
VanderVeen, D
Roarty, J
Plager, D A
Markwardt, K
Gedif, K
Lambert, S R
Article History
Received: 1 April 2016
Accepted: 6 May 2016
First Online: 1 July 2016
Competing interests
: KM and KG are employees and own stocks/shares of Alcon Laboratories, Inc. The other authors declare no conflict of interest.