3744
Airway angiogenesis and microvascular remodeling are known features of bronchial asthma , but the mechanisms of these structural alterations are just beginning to be elucidated .
 Airway, microvascular
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Airway, microvascular