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The dependence scale: an easy tool to detect chronic daily headache with medication overuse?
  1. Christian Lucas1,
  2. Hans-Christoph Diener2
  1. 1
    Service de Neurologie et Pathologie Neurovasculaire, Hôpital Salengro, CHRU de Lille, Lille, France
  2. 2
    Department of Neurology, University Hospital Essen, Essen, Germany
  1. Dr Christian Lucas, Service de Neurologie et Pathologie Neurovasculaire, Hôpital Salengro, CHRU de Lille, 59037 Lille Cedex, France; clucas{at}chru-lille.fr

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Chronic daily headache (CDH), defined by ⩾15 headache days/month for at least 3 months,1 is a major health problem which concerns approximately 3–4% of the general population.2 The total cost is also very high. It represents, for example, around 2 billion Euros in France per year.3 CDH is a descriptive entity in which the diagnosis could be essentially chronic tension-type headache and chronic migraine with or without medication overuse. The main complication of episodic tension-type headache and …

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