Der Schmerz
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Studies concerning comorbidity in patients with chronic low back pain and its correlation to the stage of chronification are rare. ⋯ Comorbidity should be given due consideration when evaluating diagnosis, therapy, prognosis and therapy outcome in patients with chronic low back pain.
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In 2003 the International Headache Society (IHS) published the second edition of the International Classification of Headache Disorders. Diagnostic criteria for no less than 206 separate headache diagnoses are presented in the parts (I) primary headaches, (II) secondary headaches and (III) cranial neuralgia, central and primary facial pain. ⋯ It is the task of the headache specialist to identify the correct headache diagnose with the smallest effort possible. Both, the differentiation between secondary and primary headaches and the differentiation between the various primary headaches are of equal importance.