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The Swedish duty hour enigma.
Sundberg K, Frydén H, Kihlström L, Nordquist J. Sundberg K, et al. Among authors: fryden h. BMC Med Educ. 2014;14 Suppl 1(Suppl 1):S6. doi: 10.1186/1472-6920-14-S1-S6. Epub 2014 Dec 11. BMC Med Educ. 2014. PMID: 25559074 Free PMC article.