216
If delay has occurred between centrifugation and the measurement , causing substantial loss of CO2 , equilibration of the sample with a gas mixture corresponding to PCO2 = 5 . 3 kPa prior to the measurement is recommended .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None