11327
Extremely significant ( P < 0 . 001 ) increase in cellular uptake of ZDV by macrophage cells was observed in case of SMPPI as compared to PPI and free drug .
 Chemical: ZDV; Chemical: PPI
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ZDV; Chemical: PPI