1. Department of Surgery (Ophthalmology), King Hussein Cancer Center, Amman 11941, Jordan
2. Department of Pediatric Oncology, King Hussein Cancer Center, Amman 11941, Jordan
3. Chair and Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland
4. Eye Clinic, Public Health Department, University of Naples Federico II, 80131 Naples, Italy