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Vaccine|January 1, 1992
Hepatitis A in Norwegian troopsP E Hesla
Sleep|January 1, 1979
The actioculographic monitor of sleepK Kayed, P E Hesla, O Røsjø
Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|February 28, 1993
[Smoking habits among Norwegian soldiers in Lebanon 1986]O P Foss, P E Hesla, L R Vasli
Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|July 10, 1998
[Can we rely on self-reported smoking habits?]O P Foss, K Haug, P E Hesla, et al.
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