Hedwig Lee is with the Department of Sociology, University of Washington, Seattle. Megan Andrew is with the Department of Sociology, University of Notre Dame, Notre Dame, IN. Achamyeleh Gebremariam is with the Child Health Evaluation and Research Unit, Julie C. Lumeng is with the Center for Human Growth and Development, and Joyce M. Lee is with the Child Health Evaluation and Research Unit, Pediatric Endocrinology, University of Michigan, Ann Arbor.(2014-05時点)