<qa>  How many patients with multiple gingival recession defects participated in this split-mouth trial?Twenty patients with multiple gingival recession defects Miller I, II participated in this split-mouth trial. Sixty defects received either MCAFPRF test or MCAF with subepithelial connective tissue graft SCTG control. Gingival recession depth RD, gingival recession width RW, keratinized tissue width KTW, recession area RA, probing depth PD, clinical attachment level CAL and gingival thickness GT were evaluated at baseline and 6 months. Additionally post-surgery patient satisfaction and pain status were measured by comparing visual analogue scale VAS scores. 