1. The University of North Carolina at Chapel Hill; School of Nursing; Carrington Hall Chapel Hill North Carolina USA 27599-7460
2. Mayo Clinic; Pediatric and Adolescent Medicine; 200 First Street, SW Rochester Minnesota USA 55905-0001
3. University of North Carolina; General Pediatrics and Adolescent Medicine; Chapel Hill North Carolina USA
4. University of North Carolina at Chapel Hill; Department of Biostatistics, School of Nursing; 120 North Medical Drive, 2005 Carrington Hall Chapel Hill North Carolina USA 27599
5. University of California Los Angeles; Department of Pediatrics; 90024 Los Angeles California USA 90024