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Peikert A, Wilimzig C, Köhne-Volland R.Peikert A, et al. Among authors: wilimzig c.Cephalalgia. 1996 Jun;16(4):257-63. doi: 10.1046/j.1468-2982.1996.1604257.x.Cephalalgia. 1996.PMID: 8792038Clinical Trial.