미국 앨러간 사의 인공 보형물이 희귀암을 유발할 가능성이 있다고 밝혀진 가운데 당시 수술을 했던 병원 중 상당수가 이미 폐업해 관련 진료 기록을 확보하기가 어려운 것으로 나타났다.
While it was found that artificial implants from Allergan in the United States could cause rare cancer, it was found that it was difficult to secure relevant medical records because many of the hospitals that operated at the time were already closed.