|
pubmed:affiliation |
Center for Clinical Epidemiology & Biostatistics, Department of Biostatistics & Epidemiology, and Center for Education & Research in Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. shenness@cceb.med.upenn.edu
|
|
pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't
|
