Dry Eye Syndrome

• Faculty of Nursing, Alexandria university — Alexandria, Egypt

• Andover Eye Associates — Andover, Massachusetts, United States

• Ching-Mao Chang — Taipei, Taiwan

• Senju Investigational Site — Cypress, California, United States

• Research Center for Traditional Medicine and History of Medicine-Shiraz University of Medical Sciences — Shiraz, Fars, Iran

Not specified

• Peking University Third Hospital — Beijing, Beijing Municipality, China

• Seoul St. Mary's Hospital — Seoul, South Korea

• Hôpital Universitaire Tahar Sfar — Mahdia, Tunisia
• "Hôpital Universitaire Fattouma Bourguiba — Monastir, Tunisia
• "Hôpital de Forces de Sécurité Intérieure La Marsa — Tunis, Tunisia

• Cornea & Cataract Consultants of Arizona — Phoenix, Arizona, United States
• Eye Research Foundation — Newport Beach, California, United States
• Eye Care Insititute — Louisville, Kentucky, United States
• Central Maine Eye Care — Lewiston, Maine, United States