Comparison of risk levels in non-clinical and follow-up environmental surveys.
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Each survey was classified as no risk (−1), low risk (100 ≤ CFUl−1 ≤ 1,000), medium risk (1,000 ≤ CFUl−1 ≤ 10,000) or high risk (>10,000 CFUl−1) based on the maximum observed contamination level.
创建时间：
2019-07-09
