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Cyclic AMP signaling has a key role in retinoid treatment efficacy : it enhances ATRA - induced maturation in ATRA - sensitive APL cells ( including NB4 cells ) and restores it in some ATRA - resistant cells ( including NB4 - LR1 cells ) .
 Chemical: Cyclic AMP; Chemical: retinoid; Chemical: ATRA; Chemical: ATRA; Chemical: ATRA
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: Cyclic AMP; Chemical: retinoid; Chemical: ATRA; Chemical: ATRA; Chemical: ATRA