AbstractGet full access to this articleView all access options for this article.Get accessReferences1. Gomoll AH Probst C Farr J Cole BJ Minas T . Use of a type I/III bilayer collagen membrane decreases reoperation rates for symptomatic hypertrophy after autologous chondrocyte implantation. Am J Sports Med. 2009;37(suppl 1):20S-23S.