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Several cases of lithium - induced Creutzfeldt - Jakob syndrome have been reported to date ; all of them were elderly patients and a half had " therapeutic " lithium serum levels .
 Creutzfeldt - Jakob syndrome, lithium; Creutzfeldt - Jakob syndrome, lithium
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 Creutzfeldt - Jakob syndrome, lithium; Creutzfeldt - Jakob syndrome, lithium