| Probably apply to Halpern SD: |
| 2008 |
-
Pulmonary, Allergy, and Critical Care Division, University of Pennsylvania School of Medicine, Philadelphia, USA. · Pubmed 18579820
|
| 2006 |
-
Department of Medicine, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6021, USA. · Pubmed 16858195
|
| 2005 |
-
Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, 19104-6021, USA. · Pubmed 15888036
|