[1] Suranaree Univ Technol, Surin Hosp, Surin 32000, Thailand
[2] Suranaree Univ Technol, Surin Med Educ Ctr, Surin 32000, Thailand
[3] Mayo Clin, Dept Med, Rochester, MN 55905 USA
[4] Chulalongkorn Univ, Ctr Excellence Glaucoma, Bangkok 10330, Thailand
[5] Chulalongkorn Univ, Fac Med, Dept Ophthalmol, Bangkok 10330, Thailand
[6] King Chulalongkorn Mem Hosp, Thai Red Cross Soc, Bangkok 10330, Thailand