Rick Slayman, the primary man to obtain a kidney transplant from a genetically engineered pig, has died, in line with a press release from his household and Massachusetts Common Hospital, the place he underwent the historic operation in March.

“Our household is deeply saddened concerning the sudden passing of our beloved Rick however take nice consolation figuring out he impressed so many,” his household mentioned within the assertion launched Saturday night.

The hospital didn’t say how or when Slayman died. A spokesperson declined to offer additional data, citing “privateness points.”