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Hammar N, Alfredsson L, Smedberg M, Ahlbom A.Hammar N, et al.Scand J Work Environ Health. 1992 Jun;18(3):178-85. doi: 10.5271/sjweh.1590.Scand J Work Environ Health. 1992.PMID: 1615292Free article.
Hammar N, Ahlbom A, Theorell T.Hammar N, et al.Epidemiology. 1992 Jul;3(4):348-55. doi: 10.1097/00001648-199207000-00010.Epidemiology. 1992.PMID: 1637898
Hammar N, Larsen FF, de Faire U.Hammar N, et al.J Clin Epidemiol. 1994 Jun;47(6):685-93. doi: 10.1016/0895-4356(94)90216-x.J Clin Epidemiol. 1994.PMID: 7722581
Hammar N, Sandberg E, Larsen FF, Ivert T.Hammar N, et al.J Am Coll Cardiol. 1997 Mar 1;29(3):659-64. doi: 10.1016/s0735-1097(96)00531-1.J Am Coll Cardiol. 1997.PMID: 9060908Free article.