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[9] Stefan Pilz, Winfried März, Britta Wellnitz, Ursula Seelhorst, Astrid Fahrleitner-Pammer, Hans P. Dimai, Bernhard O. Boehm, Harald Dobnig. Association of Vitamin D Deficiency with Heart Failure and Sudden Cardiac Death in a Large Cross-Sectional Study of Patients Referred for Coronary Angiography. The Journal of Clinical Endocrinology & Metabolism, 1 October 2008. Volume 93, Issue 10, Pages 3927–3935. https://academic.oup.com/jcem/article/93/10/3927/2627359?searchresult=1
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