Numbers of MRSA-positive volunteers in the four trials (Table S1); statistics on MRSA counts in nasal swabs in relation to class variables (Table S2); air level and MRSA (Fig. S1); correlation between the nasal MRSA level at different time points after leaving the stable and the MRSA level in the air (Fig. S2); percent MRSA-positive volunteers at different time points after leaving the stable (Fig. S3).
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