1. Ophthalmology Department, Miguel Servet Universitary Hospital, Zaragoza, Spain.
2. Instituto Aragonés de Ciencias de la Salud, Miguel Servet Universitary Hospital, Zaragoza, Spain.
3. Pathologic Anatomy Department, Miguel Servet Universitary Hospital, Zaragoza, Spain.
4. Dermatology Department, Miguel Servet Universitary Hospital, Zaragoza, Spain.