1824
The main new features of this version are that end - tidal PO2 instead of inspiratory PO2 can be kept constant , and that the correcting activity of both controllers ( capnostat and oxystat ) is proportional to the magnitude of the difference between the actual and the adjusted end - tidal PCO2 or PO2 .
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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:
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