2449
Breast tissue taken at varying postoperative times ( n = 92 ) or during surgery ( controls , n = 17 ) , was used to investigate the temporal and spatial activity of matrix metalloproteinase - 2 and - 9 and tissue inhibitor of metalloproteinase - 1 during human wound healing .
 Breast tissue, wound
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Breast tissue, wound