Send us Fan Mail One kidney can change many lives—if we let it start a chain. We sit down with Dr. John Friedewald, transplant nephrologist at Northwestern Medicine, to unpack a breakthrough: using a deceased donor kidney to initiate a living donor chain that moves multiple recipients off the waitlist and ultimately delivers a living kidney back to a service member at Walter Reed. We break down how kidney paired donation works, why non-directed donors supercharge matching, and what changes w...