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Sigfusson N, Sigvaldason H, Steingrimsdottir L, Gudmundsdottir II, Stefansdottir I, Thorsteinsson T, Sigurdsson G.Sigfusson N, et al. Among authors: sigurdsson g.BMJ. 1991 Jun 8;302(6789):1371-5. doi: 10.1136/bmj.302.6789.1371.BMJ. 1991.PMID: 2059715Free PMC article.
Sigurdsson G, Einarsson I, Josafatsson JI, Magnusson G, Olafsson O, Sigvaldason H, Thorarinsson S, Tulinius H.Sigurdsson G, et al.Scand J Prim Health Care. 1984 Nov;2(4):159-61. doi: 10.3109/02813438409017714.Scand J Prim Health Care. 1984.PMID: 6336200Free article.
Sigurdsson G, Sigfusson N, Thorsteinsson T, Olafsson O, Davidsson D, Samuelsson S.Sigurdsson G, et al.Acta Med Scand. 1983;213(1):45-50.Acta Med Scand. 1983.PMID: 6829318