1. Department of Ophthalmology, Centro Hospitalar Universitario Lisboa Central, Lisbon, Portugal
2. Department of Ophthalmology, Cuf Descobertas Hospital, Lisbon, Portugal
3. Department of Ophthalmology, School of Medicine of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
4. Department of Ophthalmology, Hospital Universitario Ramon y Cajal, Madrid, Spain; and
5. IMO Madrid, Grupo Miranza, Madrid, Spain