A joint study by the Monash Medical Centre and the Royal Children's Hospital, found for a cohort of children with gender identity disorder, the condition persisted in only 16% of cases, into adolescence and adulthood. There has been controversy – in one case a man, who underwent gender reassignment surgery and subsequently resumed life as a man, sued the Monash psychiatrists. Some former Monash patients have tried to commit suicide while struggling to live as the opposite sex after irreversible operations.