1. Department of Ophthalmology, University of Lausanne, Jules-Gonin Eye Hospital, Fondation Asile des aveugles, Lausanne, Switzerland
2. Department of Radiology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
3. Unit of Ophthalmology, University of Siena, Siena, Italy
4. Unit of pediatric Hemato-Oncology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland