3172
RESULTS : The antiapoptotic protein Bcl - 2 was highly expressed by pulmonary endothelial cells in all cases of irreversible PHT but in no cases of reversible PHT , nor in control patients ( p less than 0 . 001 ) .
 pulmonary endothelial cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 pulmonary endothelial cells