[1] Clin San Carlos Univ Hosp, Ophthalmol Unit, Madrid, Spain
[2] Univ Castilla La Mancha, Dept Ophthalmol, Albacete, Spain
[3] Miguel Hernandez Univ, Div Ophthalmol, Alicante, Spain
[4] Pio del Rio Hortega Univ Hosp, Ophthalmol Unit, Valladolid, Spain
[5] Tufts Med Ctr, New England Eye Ctr, Boston, MA USA
[6] Alicante Inst Ophthalmol, VISSUM, Vitreoretinal Unit, Alicante, Spain