1781
No therapy exists for halting the progression of the disease with the possible exception of laser photocoagulation treatment used to ablate subretinal neovascular membranes in an attempt to avoid complications of subretinal hemorrhages .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None