[1] Johns Hopkins Univ, Sch Med, Dept Pediat, 1800 Orleans St, Baltimore, MD 21218 USA
[2] New York Presbyterian Columbia & Cornell, Dept Emergency Med, 525 E 68th St,Box 301, New York, NY 10065 USA
[3] Univ Rochester, Sch Med & Dent, Dept Emergency Med, 601 Elmwood Ave, Rochester, NY 14642 USA
[4] Univ Rochester, Sch Med & Dent, Dept Obstet & Gynecol, 601 Elmwood Ave, Rochester, NY 14642 USA
[5] Sch Int Training, Food Syst, 1 Kipling Rd, Brattleboro, VT 05302 USA
[6] Univ Georgia, Dept Anthropol, 355 S Jackson St, Athens, GA 30602 USA