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Scandinavian Journal of Clinical and Laboratory Investigation|May 1, 1979
Stool porphyrins determined by high pressure liquid chromatography and by fractional hydrochloric acid--ether extractionN G Christensen, I RomsloScandinavian Journal of Clinical and Laboratory Investigation|April 1, 1989
Influence of lipid and leukocytes on the haemoglobin determination by Coulter Counter S Plus III, Technicon H 6000, Technicon H 1, LK 540, Reflotron and HemocapS Sandberg, K Sønstabø, N G ChristensenClinica Chimica Acta; International Journal of Clinical Chemistry|December 15, 1977
A rapid assay for urinary porphyrins by dual-wavelength spectrophotometryN G Christensen, B Johannessen, I RomsloTidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|June 10, 1989
[Glucose analysis in general practice. An examination of 4 instruments designed for general practice and self-monitoring]N G Christensen, S Sandberg, K O Ness, et al.Scandinavian Journal of Clinical and Laboratory Investigation|September 1, 1989
Performance of dry-chemistry instruments in primary health careS Sandberg, N G Christensen, G Thue, et al.Scandinavian Journal of Clinical and Laboratory Investigation|June 17, 2006
External quality assessment of prothrombin time: the split-sample model compared with external quality assessment with commercial control materialU Ø Sølvik, A Stavelin, N G Christensen, et al.Scandinavian Journal of Primary Health Care|November 1, 1988
Evaluation of serum separator tubes as a mail transport device in primary health careS Sandberg, N G Christensen, E Horgen, et al.Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|January 10, 1996
[Quality of hemoglobin and glucose analysis in general practice. Results from the NOKLUS (Norwegian Health Authority) surveys 1994]S Sandberg, N G Christensen, M Jevnaker, et al.Scandinavian Journal of Primary Health Care|June 1, 1991
Performance of cell counters in primary health careS Sandberg, G Thue, N G Christensen, et al.Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|July 24, 2001
[Quality of rapid tests for determination of infectious mononucleosis]K J Skurtveit, W I Bjelkarøy, N G Christensen, et al.Pageof 2