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Impaired apoptosis of pulmonary endothelial cells is associated with intimal proliferation and irreversibility of pulmonary hypertension in congenital heart disease .
 pulmonary endothelial cells, intimal, pulmonary, heart
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, intimal, pulmonary, heart