[1] Hosp Ramon & Cajal, Serv Oftalmol, Dept Ophthalmol, Cornea Unit, E-28034 Madrid, Spain
[2] Hosp Ramon & Cajal, Dept Infect Dis, Trop Med & Clin Parasitol Unit, E-28034 Madrid, Spain
[3] Univ La Laguna, Univ Inst Trop Dis & Publ Hlth Canary Isl, Tenerife, Spain