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Expression of the hypoxia - responsive transgene increased throughout the observation period , reaching 2 . 2 - fold at 2 weeks in the puromycin aminonucleoside model and 2 . 6 - fold at 4 weeks in the remnant kidney model , whereas that of vascular endothelial growth factor showed a mild decrease , reflecting distinct behaviors of the two genes .
 Disease: hypoxia; Chemical: puromycin aminonucleoside
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: hypoxia; Chemical: puromycin aminonucleoside