[1] Boston Childrens Hosp, Dept Med, Div Gen Pediat, Boston, MA USA
[2] Harvard Univ, Sch Med, Dept Pediat, Boston, MA 02115 USA
[3] McCord Hosp, Durban, South Africa
[4] Massachusetts Gen Hosp, Div Gen Med, Boston, MA 02114 USA
[5] Massachusetts Gen Hosp, Dept Med, Div Infect Dis, Boston, MA 02114 USA
[6] Harvard Univ, Sch Med, Dept Med, Boston, MA USA
[7] Brigham & Womens Hosp, Dept Med, Div Infect Dis, Boston, MA 02115 USA
[8] Brigham & Womens Hosp, Dept Orthoped Surg, Boston, MA 02115 USA
[9] Boston Univ, Sch Publ Hlth, Dept Biostat, Boston, MA USA
[10] Brigham & Womens Hosp, Div Rheumatol Immunol & Allergy, Boston, MA 02115 USA
[11] Harvard Univ, Sch Med, Dept Med, Boston, MA USA
[12] Harvard Univ, Sch Med, Dept Orthoped Surg, Boston, MA 02115 USA