Text and Data Mining valid from 2019-06-20
Received: 29 March 2019
Revised: 27 May 2019
Accepted: 31 May 2019
First Online: 20 June 2019
Compliance with ethical standards
: There are no conflicts of interest for any author of this article.
: Won Ki Lee has served on advisory boards for Novartis, Bayer, Allergan, Alcon, and Santen, and has received consultancy fees from these companies. He has received payments for lectures from Novartis, Bayer, Allergan and Alcon. Jiwon Baek and Jae Hyung Lee has no financial disclosures to report.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.Informed consent was waivered because of the retrospective design of the study.