1. Division of Paediatric Endocrinology Department of Paediatrics University of North Carolina School of Medicine Chapel Hill NC USA
2. Division of Paediatric Endocrinology Department of Paediatrics Kocaeli University Kocaeli Turkey
3. Department of Psychiatry University of North Carolina School of Medicine Chapel Hill NC USA
4. Department of Biostatistics University of North Carolina Gillings School of Public Health Chapel Hill NC USA