
Dr. Cal Matsumoto, a MedStar Georgetown University Hospital transplant surgeon, gestures to a chart on the digestive system on March 4, 2026, in Washington. (AP Photo/Shelby Lum)

Dr. Cal Matsumoto, a MedStar Georgetown University Hospital transplant surgeon, gestures to a chart on the digestive system on March 4, 2026, in Washington. (AP Photo/Shelby Lum)