Janet Wozniak, M.D., is the director of Pediatric Bipolar Research at Massachusetts General Hospital, and assistant professor of psychiatry there and at Harvard Medical School. Mary Ann McDonnell, A.P.R.N., B.C., is the executive director of S.T.E.P. Up 4 Kids, a nonprofit organization supporting children and teens with bipolar disorder. A clinical university instructor, she also maintains a private practice in pediatric psychopharmacology.