If you use autologous cartilage from ear, septum or rib for caudal septal extension graft, columella or dorsal graft, how much is the the resorption after 15 years for each of the grafts and kind of cartilage? How much of the autologous cartilage is left after 15 years? Is it totalt resorption after 15-20 years with autologous cartilage? Please refer to a investigations that support the resorption rate after 15-20 years?