| Robert Gross | Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania Perelman School of Medicine |
| Robert Gross | University of Pennsylvania Perelman School of Medicine |
| Ian Frank | University of Pennsylvania Perelman School of Medicine |
| Ian Frank | University of Pennsylvania Perelman School of Medicine |
| Sarah M Wood | University of Pennsylvania Perelman School of Medicine |
| Sarah M Wood | Children's Hospital of Philadelphia |