507
Influence of cyclo - oxygenase inhibition and of leukotriene receptor blockade on pulmonary vascular pressure / cardiac index relationships in hyperoxic and in hypoxic dogs .
 GENE: cyclo - oxygenase; GENE: leukotriene receptor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: cyclo - oxygenase; GENE: leukotriene receptor