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Falk A, Hanson BS, Isacsson SO, Ostergren PO.Falk A, et al. Among authors: ostergren po.Am J Public Health. 1992 Aug;82(8):1136-9. doi: 10.2105/ajph.82.8.1136.Am J Public Health. 1992.PMID: 1636836Free PMC article.
Dejin-Karlsson E, Hanson BS, Ostergren PO, Ranstam J, Isacsson SO, Sjöberg NO.Dejin-Karlsson E, et al. Among authors: ostergren po.J Epidemiol Community Health. 1996 Feb;50(1):33-9. doi: 10.1136/jech.50.1.33.J Epidemiol Community Health. 1996.PMID: 8762351Free PMC article.