| Frankel EA | University of Pittsburgh Medical Center-St. Margaret, Pennsylvania 15213-2583, USA. |
| Hibbs AM | Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA. annamariahibbs@hotmail.com |
| Katz PO | Division of Gastroenterology, Albert Einstein Medical Center, Philadelphia, Pennsylvania, USA. |
| Landreneau RJ | The Heart, Lung, and Esophageal Surgery Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA. |
| Lorch SA | Division of Neonatology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA. |
| Metz DC | Division of Gastroenterology, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia 19104, USA. |
| Orenstein SR | University of Pittsburgh Medical Center-St. Margaret, Pennsylvania 15213-2583, USA. |
| Richter JE | Department of Medicine, Temple University School of Medicine, Philadelphia, PA 19140, USA. jrichter@temple.edu |
| Wertheimer AI | School of Pharmacy, Temple University, Philadelphia, Pennsylvania, USA. Albert.wertheimer@temple.edu |
| Wilson JM | School of Pharmacy, Temple University, Philadelphia, Pennsylvania, USA. |
| Yang YX | Division of Gastroenterology, Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia 19104, USA. yangy@mail.med.upenn.edu |
| el-Sherif AE | The Heart, Lung, and Esophageal Surgery Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA. |