About the Authors

Mansing Ratanasukon

mratanasukon@yahoo.com

Affiliation Department of Ophthalmology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand

Jongjit Tongsomboon

Affiliation Department of Nursing, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand

Patama Bhurayanontachai

Affiliation Department of Ophthalmology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand

Pichai Jirarattanasopa

Affiliation Department of Ophthalmology, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand

Competing Interests

The authors received funding from Novartis for this work. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MR. Performed the experiments: MR JT PB PJ. Analyzed the data: MR. Contributed reagents/materials/analysis tools: MR. Wrote the paper: MR.