| Affiliation: | 1. Departments of Pediatrics and Internal Medicine, Esophageal Diseases Center, Children’s Medical Center, VA North Texas Health Care System, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA;2. Department of Internal Medicine, Esophageal Diseases Center, Children’s Medical Center, VA North Texas Health Care System, Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA;1. Center for Child and Adolescent Health Research and Policy, Massachusetts General Hospital for Children, Boston, Massachusetts;2. Department of General Medicine, Massachusetts General Hospital, Boston, Massachusetts;3. AAP Richmond Center of Excellence, American Academy of Pediatrics, Elk Grove Village, Illinois;4. Pediatric Research in Office Settings, American Academy of Pediatrics, Elk Grove Village, Illinois;1. Center for Child and Adolescent Health Research and Policy, and Tobacco Research and Treatment Center, Massachusetts General Hospital, Boston, Mass;2. General Medicine Division, Massachusetts General Hospital, Boston, Mass;3. Pediatric Research in Office Settings, American Academy of Pediatrics, Elk Grove Village, Ill;4. AAP Richmond Center of Excellence, American Academy of Pediatrics, Elk Grove Village, Ill;5. Department of Public Health Sciences, University of Rochester, Rochester, NY;6. UCLA West Los Angeles Office, Los Angeles, Calif;1. Servicio de Obstetricia y Ginecología, Hospital de Jarrio, Jarrio, Coaña, Asturias, España;2. Servicio de Anatomía Patológica, Hospital de Jarrio, Jarrio, Coaña, Asturias, España;3. Servicio de Medicina Nuclear, Hospital Universitario Central de Asturias, Oviedo, Asturias, España |
