19679
Weanling male Wistar rats received a normal ( 24 % ) or low ( 2 . 5 % ) protein diet for 28days and were allocated into : normally - fed control , protein - malnourished control ( PM ) , 3 normally - fed drug - treated groups and 3 protein - malnourished drug - treated groups ( PM - CP , PM - FU and PM - MMC ) .
 MMC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 MMC