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Exemplary results of quantitative bacterial detections (GE/sample) of S. mitis, M. salivarium, Enterobacteriaceae and A. baumannii; the results of all 37 participants are shown on cheek (W), graft (T) and suture swab (N) at the preoperative time point (0), early postoperative time point (1) and late postoperative time point (2). * p <0.05; ** p <0.01.
