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Bischoff-Ferrari, HA; Willett, WC; Wong, JB; Stuck, AE; Stähelin, HB; Orav, JE; Thoma, A; Kiel, DP; Henschkowski, J (2009). Prevention of nonvertebral fractures with oral vitamin D and dose dependency: a meta-analysis of randomized controlled trials. Archives of internal medicine, -(-), pp. 551-561. Chicago, Ill.: American Medical Association 10.1001/archinternmed.2008.600
