5241
At different times of the surgical procedures ( thorax opening and closure , period of cardiopulmonary bypass ) 67 to 100 % of the patients in group 1 had vancomycin concentrations in the studied tissues above the MIC 90 for Staphylococcus aureus ( 1 microgram / g ) and Staphylococcus epidermidis ( 2 micrograms / g ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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