60
The rats were randomly allotted into one of the four experimental groups : A ( control ) , B ( 1 day after scrotal hyperthermia ) , C ( 14 days after scrotal hyperthermia ) , and D ( 35 days after scrotal hyperthermia ) ; each group comprised 7 animals .
 None
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