1 Department of Pediatrics, University of Chicago Pritzker School of Medicine (HB Fromme), Chicago, Ill. Electronic address: hfromme@peds.bsd.uchicago.edu.
2 Department of Pediatrics, Virginia Commonwealth University School of Medicine (MS Ryan), Richmond, Va.
3 Department of Pediatrics, The Larner College of Medicine at the University of Vermont (K Gray), Burlington, Vt.
4 Department of Pediatrics, University of Florida College of Medicine (E Black and N Paradise Black), Gainesville, Fla.
5 Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons (S Paik), New York, NY.
6 Department of Pediatrics, University of Washington School of Medicine (E Griego), Seattle, Wash.
7 Department of Pediatrics, University of Utah School of Medicine, Primary Children's Hospital (I Kocolas and F Cipriano), Salt Lake City, Utah.