“…We realized a review of the literature since 1970 to answer the question of frequency and reliability of regression. Twenty-five series including 830 patients and 6 case reports were found, totaling 836 patients suitable for analysis [16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46]. The design of the series was prospective and randomized (n=1), prospective (n=6), and retrospective (n=18).…”