1. Hôpital du Valais, 1951 Sion, Switzerland
2. Centre Hospitalier Universitaire Vaudois (CHUV), 1011 Lausanne, Switzerland
3. Aurigen, Centre de Pathologie, 1004 Lausanne, Switzerland
4. Department of Pediatrics, Gynecology and Obstetrics, Geneva University Hospitals, Boulevard de la Cluse 30, 1205 Geneva, Switzerland