1917
Unlike traditional pharmacological approaches , transplanted cells might be capable of simultaneously targeting multiple pro - survival pathways via local delivery of secreted factors and / or via modulation of the intraocular microenvironment .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None