Departments of *Anesthesiology and Critical Care Medicine
§Pediatrics, Division of Rheumatology, The Children’s Hospital of Philadelphia
Departments of ∥Biostatistics and Epidemiology
‡Biotechnology, School of Engineering and Applied Science
†Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA
The authors declare no conflict of interest. Supported by Award Number R03HD054596 from the Eunice Kennedy Shriver National Institute of Child Health & Human Development, Bethesda, MD. The content is solely the responsibility of the authors and does not necessarily represent the official views of the Eunice Kennedy Shriver National Institute of Child Health & Human Development or the National Institutes of Health, Bethesda, MD.
Reprints: Jessica W. Guite, PhD, Division of Pain and Palliative Medicine, Connecticut Children’s Medical Center, Hartford Hospital/The Institute of Living, University of Connecticut School of Medicine, 282 Washington Street, Hartford, CT 06106 (e-mail: [email protected]).
Received January 24, 2012
Accepted December 27, 2012
