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Rø OC, Hjort PF.Rø OC, et al. Among authors: hjort pf.Scand J Prim Health Care. 1985 Sep;3(3):133-6. doi: 10.3109/02813438509013933.Scand J Prim Health Care. 1985.PMID: 4059708No abstract available.
Hofoss D, Hjort PF.Hofoss D, et al. Among authors: hjort pf.Soc Sci Med A. 1981 May;15(3 Pt 2):371-5. doi: 10.1016/0271-7123(81)90067-5.Soc Sci Med A. 1981.PMID: 6972614No abstract available.
Hofoss D, Hjort PF.Hofoss D, et al. Among authors: hjort pf.World Health Forum. 1988;9(3):315-21.World Health Forum. 1988.PMID: 3252810No abstract available.