Home / Special Procedures & Techniques / Cartilage Restoration / Autologous Cultured Chondrocyte on a Porcine Collagen Membrane (MACI -Vericel) Autologous Cultured Chondrocyte on a Porcine Collagen Membrane (MACI -Vericel) MACI should not be used in patients who are allergic to antibiotics such as gentamicin, or materials of cow, porcine or ox origin. Trochlear lesion Collegiate Football Player OCD Case Report You will need the Adobe Reader to view and print the above documents.