A surgeon at a Houston hospital is accused of manipulating a government database to make sure some of his own patients would never receive a liver transplant. It’s unknown how many patients may have been affected. Memorial Hermann-Texas Medical Center in Houston confirmed on Thursday that it found evidence that a doctor in its liver transplant department had effectively denied transplants by changing records. The physician was identified as J. Steve Bynon Jr, according to the New York Times. Doctors are required to list certain criteria – such as a donor’s age and weight – when a patient is ad…