1. Department of Pediatric Immunology, Allergy and Rheumatology, Hospital San Pablo, Coquimbo, Chile;
2. Department of Anatomic Pathology, Hospital San Pablo, Universidad Catolica del Norte, Coquimbo, Chile;
3. Department of Dermatology, Hospital San Pablo, Coquimbo, Chile;
4. Department of Pediatric Surgery, Hospital San Pablo, Coquimbo, Chile; and
5. Department of Pediatric Gastroenterology, Hospital San Pablo, Coquimbo, Chile.