Philly.com | 2-Sizes-Too-Small 'Grinch' Effect Hampers Heart Transplantation Success RedOrbit Current protocols for matching donor hearts to recipients foster sex mismatching and heart size disparities, according to a first-of-its kind analysis by physicians at the University of Maryland School of Medicine. Matching by donor heart size may ... Study: 2-sizes-too-small 'Grinch' effect hampers heart transplantation success Finding the Right Heart for Transplantation When it comes to heart transplants, size may matter most |