3170
METHODS : We assessed antiapoptotic and proapoptotic markers in vascular and perivascular cells in lung biopsy samples from 18 patients with CHD , 7 with reversible and 11 with irreversible PHT , and 6 control patients .
 vascular, perivascular cells, lung biopsy samples
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 vascular, perivascular cells, lung biopsy samples