[1] Brooke Army Med Ctr, Dept Pediat, San Antonio, TX 78251 USA
[2] Uniformed Serv Univ Hlth Sci, Dept Pediat, Bethesda, MD 20814 USA
[3] Mayo Clin, Rochester, MN USA
[4] Pediat Med Grp San Antonio, San Antonio, TX USA
[5] Baylor Coll Med, San Antonio, TX USA
[6] Gulf Coast Neonatol, Houston, TX USA
[7] Pediatrix Med Grp Savannah, Savannah, GA USA
[8] Univ Utah Hlth, Dept Pediat, Div Neonatol, Salt Lake City, UT USA