Kang, Kyung Tae http://orcid.org/0000-0001-9276-9607
Kim, Yu Cheol http://orcid.org/0000-0003-1615-6651
Article History
Received: 10 January 2019
Accepted: 8 May 2019
First Online: 3 June 2019
Competing Interests
: Y.C.K. reports honorarium from Allergan, Bayer, Novartis and Santen, and research grant from Bayer, outside the submitted work; K.T.K. has no financial or non-financial disclosure.