1. Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
2. Center of Excellence for Cornea and Stem Cell Transplantation, Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
3. Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
4. Applied Medical Virology Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
5. Department of Ophthalmology, King Chulalongkorn Memorial Hospital, Thai Red Cross, Bangkok, Thailand
6. Department of Microbiology, King Chulalongkorn Memorial Hospital, Thai Red Cross, Bangkok, Thailand
7. Department of Ophthalmology, Chaophaya Abhaibhubejhr Hospital, Prachinburi, Thailand