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Holmberg L, Ohlander EM, Byers T, Zack M, Wolk A, Bergström R, Bergkvist L, Thurfjell E, Bruce A, Adami HO.Holmberg L, et al. Among authors: bergstrom r.Arch Intern Med. 1994 Aug 22;154(16):1805-11. doi: 10.1001/archinte.154.16.1805.Arch Intern Med. 1994.PMID: 8053747