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Use of a fixed combination of acetylsalicylic acid, acetaminophen and caffeine compared with acetaminophen alone in episodic tension-type headache: meta-analysis of four randomized, double-blind, placebo-controlled, crossover studies

Crossref DOI link: https://doi.org/10.1186/1129-2377-15-76

Published Online: 2014-11-19

Published Print: 2014-12

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