(CNN) — A man who lived with a genetically modified pig kidney for a record 271 days had the organ removed and will return to dialysis.

Tim Andrews of New Hampshire received the transplant in January, but surgeons at Mass General Brigham removed the organ Thursday because of a decline in kidney function.

Andrews, 67, was the fourth living patient in the US to get a kidney transplant from a pig that had been genetically modified to help prevent organ rejection and other complications.

Andrews, who had had diabetes since the 1990s, learned about three years ago that he had end-stage kidney disease. Dialysis saved his life, but the process was draining: He was connected to the machines for six hours, three days a week. On days off, he’d sleep. By the time he woke up, he’d have to start

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