Two area men can now say they were part of one of the largest organ donation swaps in history. Honored Thursday at the Emory Clinic in Atlanta, Troy Milford and Robert Poole were part of what is being called “Chain 221,” the world’s second-largest kidney swap, and the largest kidney swap to be concluded in less than 40 days. Milford and Poole, both patients at the Emory Transplant Center, were two of the 56 participants.