3051
Our data suggest that the lower blood vessel density found in the patients with 1 mm / day distraction rate may be related to disruption of angiogenesis in the soft connective tissue of the gap or to a less optimal mechanical stimulation of cells involved in angiogenesis .
 blood vessel, soft connective tissue, cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 blood vessel, soft connective tissue, cells