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Mean values and standard errors of SLPQRAW (sleep quantity -raw) and SLP6 (sleep problems index 1) in primary headache groups. The symbol * indicate the results of Bonferroni test: chronic migraine compared to migraine with and without aura, other TACs, migraine without aura plus episodic tension type headache, and chronic and episodic tension type headache: p < 0.05.
