11724
Polyethylene glycol - g - polyvinyl alcohol ( PEG - PVA ) grafted copolymer was administered by gavage to groups of 25 male and 25 female young Wistar rats at doses of 0 ( vehicle control ) , 100 , 300 , or 1000mg / kg bw / day for one generation ( F0 ) .
 Polyethylene glycol, polyvinyl alcohol, PEG - PVA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Polyethylene glycol, polyvinyl alcohol, PEG - PVA