3157
A 24 - h exposure of cells to all - trans - RA was sufficient to cause a 30 % decrease in the collagenolytic activity , and this inhibitory effect was reversible .
 Anatomy: cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: cells