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When tumors were treated with a single dose of cyclophosphamide ( 60 mg / kg i . p . ) 5 days after implantation , a growth delay with a subsequent regrowth of the tumors was observed .
 Disease: tumors; Chemical: cyclophosphamide; Disease: tumors
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: tumors; Chemical: cyclophosphamide; Disease: tumors