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External review and validation of the Swedish national inpatient register.
Ludvigsson JF, Andersson E, Ekbom A, Feychting M, Kim JL, Reuterwall C, Heurgren M, Olausson PO. Ludvigsson JF, et al. Among authors: olausson po. BMC Public Health. 2011 Jun 9;11:450. doi: 10.1186/1471-2458-11-450. BMC Public Health. 2011. PMID: 21658213 Free PMC article.
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