Fig. 1

Patient disposition. A total of 80 patients with AS were enrolled, among whom contact was lost in 7 patients (2 patients in Kunxian group and 5 in placebo group), 2 patients exited for adverse events (one in Kunxian group and one in placebo group), and 2 patients had incomplete information (one in Kunxian group and one in placebo group). Finally, 68 patients completed clinical observation throughout the 12 weeks (35 in Kunxian group and 33 in placebo group)