1507
A comparison of individual selective and unselective cyclooxygenase inhibitors suggests substance - specific differences , which may depend on differences in pharmacokinetic parameters or inhibitory potency and may be contributed by prostaglandin - independent effects .
 Chemical: cyclooxygenase inhibitors; Chemical: prostaglandin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: cyclooxygenase inhibitors; Chemical: prostaglandin