1 Pediatric Programs, Critical Path Institute, Tucson, AZ.
2 Office of Medical Policy, Center for Drug Evaluation and Research, US Food and Drug Administration, Silver Spring, MD; Department of Medicine, Yale University, New Haven, CT.
3 Department of Pediatrics, Tufts Medical Center, Boston, MA; Tufts Clinical and Translational Science Institute, Tufts University, Boston, MA. Electronic address: jdavis@tuftsmedicalcenter.org.