DALLAS (AP) — Several relatives of patients who died while waiting for a new liver said Wednesday they want to know if their loved ones were wrongfully denied a transplant by a Houston doctor accused of manipulating the waitlist to make some patients ineligible to receive a new organ.

Officials at Memorial Hermann-Texas Medical Center have said they are investigating after finding that a doctor had made “inappropriate changes” in the national database for people awaiting liver transplants. Earlier this month, the hospital halted its liver and kidney programs.

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