278
Once the proliferation of fibroblasts and collagen synthesis had led to an increase of mechanical strength , no negative effect on wound healing could be detected applying the same chemotherapeutic agents .
 GENE: collagen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: collagen