1. Department of Communicative Disorders, The University of Alabama, Tuscaloosa
2. Neonatal Intensive Care Unit, Brigham and Women's Hospital, Boston, MA
3. Departments of Pediatrics, Otolaryngology—Head & Neck Surgery, and Physical Medicine & Rehabilitation, Johns Hopkins School of Medicine, Baltimore, MD
4. Pediatrics, Gastroenterology, Hepatology & Nutrition, Medical College of Wisconsin, Wauwatosa