1824
HYPOTHESIS : This study was designed to compare coronary collateral circulation ( CCC ) in patients with proliferative diabetic retinopathy ( PDR ) with that in patients without DR .
 Anatomy: coronary collateral
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: coronary collateral