20345
Although most studies confirm previous findings that CYP3A4 / 5 activity is low at birth and reaches adult values in the first years of life , there are still important gaps in our knowledge of the exact developmental patterns of individual CYP3A isoforms , especially in this age range .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None