1. Department of Pediatrics Jichi Medical University School of Medicine Shimotsuke Japan
2. Division of Pediatrics Showa Inan General Hospital Komagane Japan
3. Department of Pediatrics Gifu University Graduate School of Medicine Gifu Japan
4. Center for Vascular Anomalies KKR Sapporo Medical Center Tonan Hospital Sapporo Japan
5. Department of Dermatology Kanagawa Children's Medical Center Yokohama Japan
6. Department of Dermatology Mizonokuchi Hospital, Teikyo University School of Medicine Kawasaki Japan
7. Department of Plastic and Reconstructive Surgery National Center for Child Health and Development Tokyo Japan