Gordon -Weiss Vision Institute, San Diego, California, United States
Edward Harkness Eye Institute at Columbia University Medical Center, New York, New York, United States
Shiley Eye Center, La Jolla, California, United States
Cornea & Laser Eye Institute; Hersh Vision Group, Teaneck, New Jersey, United States
Durrie Vision, Kansas City, Kansas, United States
Shiley Eye Center, La Jolla, California, United States
Private Practice, Weinheim, Germany
Mainz University, Mainz, Germany
Klinik Vincentinum, Augsburg, Germany
Augenklinik der Technischen Universitat, Munich, Germany
Vienna Medical Hospital, Vienna, Austria
The Netherlands Ophthalmic Research Institute, Amsterdam, Netherlands
Ophthalmic Clinic, Rotterdam, Netherlands
University of Cologne, Cologne, Germany
Instituo Oftalmologico de Aragon, Zaragoza, Spain
Universitats Augenklinik, Freiburg, Germany
Clinico San Carlos, Madrid, Spain
Rotkreuz Krankenhaus, Mรผnchen, Germany
North Bay Eye Associates Inc, Petaluma, California, United States
Williamson Nelson Eye Center, Baton Rouge, Louisiana, United States
Clayton Eye Center, Morrow, Georgia, United States