In January 1992, the FDA Commissioner announced a voluntary moratorium of the sale of gel-filled breast implants to allow the advisory panel time to assess additional information. In April 1992, the moratorium was lifted but only for reconstruction and revision subjects. Every subject implanted had to be part of an Adjunct Study, in addition to being offered participation in a registry of gel-filled breast implant subjects. The Adjunct Study devices included the round MemoryGel, Becker Expander/Prosthesis and the Lumera implants. In order to be implanted with gel-filled implants for augmentation, women had to be enrolled in an Investigational Device Exemption (IDE) clinical trial.