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Reduced discontinuation of antihypertensive treatment by two-drug combination as first step. Evidence from daily life practice

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Prescription pattern of codeine for non-malignant pain: a pharmacoepidemiological study from the Norwegian Prescription Database

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The Nordic Countries as a Cohort for Pharmacoepidemiological Research

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Persistence and compliance to antidepressant treatment in patients with depression: A chart review

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Increasing use of opioids from 2004 to 2007 - Pharmacoepidemiological data from a complete national prescription database in Norway

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Clinical Guidelines for the Use of Chronic Opioid Therapy in Chronic Noncancer Pain

(2009) Roger Chou et al.   JOURNAL OF PAIN

Trends in long-term opioid therapy for chronic non-cancer pain

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