From the *Department of Pediatrics, University of Pittsburgh School of Medicine; †Department of Pediatrics, Children’s Hospital of Pittsburgh of the University of Pittsburgh Medical Center; and ‡Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA.
Accepted for publication 19, 2013.
This work was supported, in part, by Grant 3U01AI066007-02S1 from the National Institute of Allergy and Infectious Diseases. The authors have no other funding or conflicts of interest to disclose.
Address for correspondence: Jack L. Paradise, MD, Division of General Academic Pediatrics, Children’s Hospital of Pittsburgh of UPMC, Children’s Hospital Office Bldg., 3rd Fl., 4401 Penn Ave., Pittsburgh, PA 15224. E-mail: firstname.lastname@example.org.