Dry Eye Syndromes

• Rajavithi Hospital, 2, Phayathai Road, Ratchathewi District — Bangkok, Thailand

• Zhongshan Ophthalmic Center — Guangzhou, Guangdong, China

• Oftalvist — Alicante, Spain
• IOBA — Valladolid, Spain

• Beijing Anzhen Hospital — Beijing, Beijing Municipality, China
• Beijing Aier-Intech Eye Hospital — Beijing, China
• Chinese PLA General Hospital — Beijing, China
• Peking Union Medical College Hospital — Beijing, China

• Instituto de Oftalmología Conde de Valenciana — Mexico City, Mexico

• Butchertown Clinical Trials — Louisville, Kentucky, United States

Not specified

• Zhongshan Ophthalmology Center, Sun Yat sen University — Guangzhou, Guangdong, China

• Pokhara Academy of Health Sciences — Pokhara, Gandaki, Nepal

Not specified