[1] Complexo Hosp Univ Pontevedra, Serv Oftalmol, Pontevedra 36003, Spain
[2] Hosp Clin Univ Santiago De Compostela, Unidad Epidemiol Clin, Santiago De Compostela, Spain
[3] Hosp Clin Univ Santiago De Compostela, Serv Oftalmol, Santiago De Compostela, Spain
[4] Univ Santiago De Compostela, Dept Oftalmol, Santiago De Compostela, Spain