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Although only few clinical descriptions of the relationship between hyperalgesia / myoclonus and high doses of morphine are available , experimental support from animal studies indicates that morphine , or its metabolites , plays a causative role for the observed behavioural syndrome .
 Disease: hyperalgesia; Disease: myoclonus; Chemical: morphine; Chemical: morphine
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:
 Disease: hyperalgesia; Disease: myoclonus; Chemical: morphine; Chemical: morphine