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Källén, B., Källén, K., Edlund, M. and Otterblad-Olausson, P. (2002) Utvärdering av det svenska Medicinska fädelseregistret (in Swedish). The National Board of Health and Welfare.
http://www.socialstyrelsen.se/Lists/Artikelkatalog/Attachments/10961/2002-112-4_20021124.pdf
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