6612
Forty - eight male Wistar rats were divided into sedentary and exercised groups , and each group was fed as a protein source casein ( CAS ) , whey protein ( WP ) or whey protein hydrolysate ( WPH ) for 3weeks .
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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