1. Department of Dermatology, University of California, San Francisco, California
2. Department of Dermatology, Medical College of Wisconsin, Milwaukee, Wisconsin
3. Department of Dermatology, Hospital de la Santa Creu I Sant Pau, Barcelona, Spain
4. Departments of Pediatrics and Dermatology, Northwestern University Feinberg School, of Medicine, Chicago, Illinois
5. Departments of Dermatology and Pediatrics, Columbia University, New York, New York
6. Section of Dermatology, Children's Mercy Hospital and Clinics, Kansas City, Missouri
7. Division of Pediatric Dermatology and the Hemangioma and Vascular Malformation Center, Cincinnati Children's Hospital, Cincinnati, Ohio
8. Department of Dermatology, Baylor College of Medicine, Houston, Texas