[1] Boston Coll, Connell Sch Nursing, 140 Commonwealth Ave, Chestnut Hill, MA 02467 USA
[2] Fenway Inst, Fenway Hlth, Boston, MA USA
[3] Penn State Univ, Dept Behav Hlth, University Pk, PA 16802 USA
[4] Beth Israel Deaconess Med Ctr, Dept Med, Boston, MA 02215 USA
[5] Harvard Med Sch, Boston, MA 02115 USA
[6] Indiana Univ Sch Med, Sect Adolescent Med, Indianapolis, IN 46202 USA