[1] Univ N Carolina, Sch Med, Dept Pediat, Div Gen Pediat & Adolescent Med, Chapel Hill, NC USA
[2] Indiana Univ Sch Med, Ryan White Ctr Pediat Infect Dis & Global Hlth, Dept Pediat, Indianapolis, IN USA
[3] Indiana Univ Sch Med, Dept Pediat, Div Adolescent Med, Indianapolis, IN USA
[4] Indiana Univ Sch Med, Ruth Lilly Med Lib, Indianapolis, IN USA
[5] 231 MacNider Bldg,CB 7225 333 S Columbia St, Chapel Hill, NC 27599 USA