1. Department of Dermatology, University of Rochester School of Medicine and Dentistry, Rochester, New York
2. Department of Dermatology, Hospital Garrahan, Buenos Aires, Argentina
3. Division of Pediatric Dermatology, Nationwide Children’s Hospital and The Ohio State University College of Medicine, Columbus, Ohio
4. Department of Dermatology, Hospital Universitario Austral, Buenos Aires, Argentina
5. Department of Dermatology, Instituto Nacional De Pediatría, México City, México
6. Department of Dermatology, Instituto Nacional de Salud del Niño, Breña, Perú