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Leren P, Askevold EM, Foss OP, Froili A, Grymyr D, Helgeland A, Hjermann I, Holme I, Lund-Larsen PG, Norum KR.Leren P, et al.Acta Med Scand Suppl. 1975;588:1-38.Acta Med Scand Suppl. 1975.PMID: 1062920No abstract available.
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Holme I, Helgeland A, Hjermann I, Leren P, Lund-Larsen PG.Holme I, et al. Among authors: leren p.Acta Med Scand. 1981;209(4):277-83. doi: 10.1111/j.0954-6820.1981.tb11591.x.Acta Med Scand. 1981.PMID: 7234503
Holme I, Helgeland A, Hjermann I, Lund-Larsen PG, Leren P.Holme I, et al. Among authors: leren p.Lancet. 1976 Dec 25;2(8000):1396-8. doi: 10.1016/s0140-6736(76)91930-9.Lancet. 1976.PMID: 63860
Helgeland A, Leren P, Enger SC, Hjermann I, Holme I.Helgeland A, et al. Among authors: leren p.Acta Med Scand Suppl. 1979;625:131-4. doi: 10.1111/j.0954-6820.1979.tb00757.x.Acta Med Scand Suppl. 1979.PMID: 219665Clinical Trial.No abstract available.
Enger SC, Hjermann I, Foss OP, Helgeland A, Holme I, Leren P, Norum KR.Enger SC, et al. Among authors: leren p.Artery. 1979 Feb;5(2):170-81.Artery. 1979.PMID: 231954
Helgeland A, Aasen IB, Leren P.Helgeland A, et al. Among authors: leren p.Acta Med Scand Suppl. 1979;626:34-6.Acta Med Scand Suppl. 1979.PMID: 285589Clinical Trial.No abstract available.