1640
A wound model for decubitus and leg ulcers consisting of human dermal fibroblasts in type I collagen dermal " equivalent " matrix ( DEM ) was exposed in vitro to electric fields similar to postulated endogenous fields in wounds .
 GENE: type I 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: type I collagen