A hacker who "tagged" medical centre websites, including one in Wellington, could have gone on to gain access to patients' records, a computer security expert says.Aura Software Security managing director Andy Prow said the hacker, who called himself "Mister Saint", appeared to be a prankster and made no attempt to gain access to patient data."But this highlights the security risks ... general practice should really take this as a warning."As repositories of highly sensitive information, medical clinics were prime targets for hackers looking for kudos, he said.Karori Medical Centre was among several practices that had their websites emblazoned with the cheeky message: "Hacked by Mister Saint".Centre manager Jo Douglas said the bogus links were removed as soon as they were discovered last week...