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Fig. 3 | BMC Neurology

Fig. 3

From: Clinical characteristics, medication use, and impact of primary headache on daily activities: an observational study using linked online survey and medical claims data in Japan

Fig. 3

Age of headache onset (A) and years lived with headache (B). Notes: Response (n) represents the number of individuals with responses. Age of headache onset and years lived with headache were categorical, and the percentage was calculated based on individuals who answered having periodic headaches

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BMC Neurology

ISSN: 1471-2377

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