Comparison of pad weight in gram according to Hahn & Fall preoperatively (n = 133*), at 1- (n = 126), 6- (n = 70), and 9-year (n = 41) follow-ups. *For the better overview, 6 outliers were removed from the figure. p values were calculated for each follow-up period comparing it to the particular baseline. All p < 0.001.