[1] Nestl Nutr, 12 Vreeland Rd, Florham Pk, NJ 07932 USA
[2] Penn State Univ, Coll Hlth & Human Dev, Dept Human Dev & Family Studies, University Pk, PA 16802 USA
[3] Univ Colorado Denver, Dept Community & Behav Hlth, Aurora, CO 80045 USA
[4] Johns Hopkins Univ, Sch Med, Dept Pediat, Baltimore, MD 21287 USA
[5] Harvard Pilgrim Hlth Care Inst, Dept Populat Med, Obes Prevent Program, Boston, MA 02215 USA
[6] Harvard Med Sch, Boston, MA 02215 USA