531
This led to the conclusion that the metatarsal artery should be used for toe MP joint grafts , while the unilateral proper digital artery is suitable for toe PIP joint grafts , together with concomitant or dorsal cutaneous vein .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None