1 From the I.R.C.C.S.-G.B. Bietti Foundation, Rome, Italy (Savini, Schiano-Lomoriello); Stein Eye Institute, University of California, Los Angeles, California (Hoffer); St. Mary's Eye Center, Santa Monica, California (Hoffer); Hospital da Luz Lisboa, Lisbon, Portugal (Ribeiro); Lisbon University, Lisbon, Portugal (Ribeiro); Visual Science Research Centre, Lisbon, Portugal (Ribeiro); GoLP/IPFN, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal (Dias, Coutinho); San Raffaele Hospital, Milan, Italy (Barboni); Studio Oculistico d'Azeglio, Bologna, Italy (Barboni).