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Therapeutic effect of QWS on ulcers healing. A Images of ulcers in six groups were presented. B Quantification of ulcers area. C Quantification of ulcer healing rate. T2DM, type 2 diabetes mellitus; OU, oral ulcer; SH, stomach heat syndrome; QWS-L, Qingwei San extract (1.32 g/kg); QWS-H, Qingwei San extract (5.14 g/kg). Data were shown as mean ± SD. &P < 0.05, &&P < 0.01 vs. T2DM + SH + OU group
