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Metadata
ID	SYMP:0000504
Name	headache
Definition	A pain that is characterized by a pain in the head. http://www2.merriam-webster.com/cgi-bin/mwmednlm?book=Medical&va=headache
Xrefs	UMLS_CUI:C0018681
Synonyms	cephalalgia [EXACT]
Parent Relationships	is_a pain
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