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PATIENTS : One hundred and one patients ( 28 men and 73 women ) with bipolar disorder receiving lithium maintenance therapy ranging from 1 year ' s to 32 years ' duration .
 Disease: bipolar disorder; Chemical: lithium
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: bipolar disorder; Chemical: lithium