1345
The subjects ' lungs were ventilated with N2O in O2 ( FIO2 0 . 3 ) to the end - tidal CO2 present before anesthesia , and then CBF was measured using intravenous 133Xe and ten scintillation counters , five over each cerebral hemisphere .
 None
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