A New Hampshire man lived with a pig kidney for a record 271 days before surgeons removed it last week as the organ’s function declined. Doctors at Mass General Brigham said Monday that Tim Andrews is resuming dialysis after the Oct. 23 surgery, and called him a “selfless medical pioneer.” Andrews is among a handful of people who’ve received experimental transplants of gene-edited pig organs, which researchers hope might one day help alleviate a shortage of donated organs. Two U.S. companies are preparing to begin rigorous clinical trials of pig kidney transplants.