1. Lankenau Institute for Medical Research; Marks Colorectal Surgical Associates, Department of Surgery, Lankenau Medical Center, Wynnewood, Pennsylvania
2. Marks Colorectal Surgical Associates, Lankenau Medical Center; Lankenau Institute for Medical Research, Wynnewood, Pennsylvania
3. Marks Colorectal Surgical Associates, Department of Surgery, Lankenau Medical Center, Lankenau Institute for Medical Research; Wynnewood, Pennsylvania