Published on in Vol 13, No 4 (2011): Oct-Dec
1 University of Pittsburgh School of Medicine, General Academic Pediatrics, Children’s Hospital of Pittsburgh of UPMC, Pittsburgh, PA, PA, United States
2 Department of Internal Medicine, University of Kansas School of Medicine at Wichita, Wichita, KS, KS, United States
3 Department of Biology, Carnegie Mellon University, Pittsburgh, PA, PA, United States
4 Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, ON, Canada
5 Health Sciences Library System, University of Pittsburgh, Pittsburgh, PA, PA, United States