25179
Analgesia trended toward a correlation with brain morphine concentrations ( p = 0 . 07 ) and correlated with brain morphine to codeine ratios ( p < 0 . 005 ) , but not with plasma morphine concentrations ( p > 0 . 8 ) or plasma morphine to codeine ratios ( p > 0 . 8 ) .
 Chemical: morphine; Chemical: morphine; Chemical: codeine; Chemical: morphine; Chemical: morphine
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: morphine; Chemical: morphine; Chemical: codeine; Chemical: morphine; Chemical: morphine