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In this review we discuss current concepts regarding beta ( 2 ) ARs and cAMP in the regulation of ASM cell functions and their therapeutic roles in asthma and COPD .
 Chemical: cAMP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cAMP