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Oremek, G.M., Oertl A., Bertsch, T., Bewarder, N, Bürger, V., Dannenberg, R., Dibbelt, L., Gerstmayer, A., Grunow, G., Irmer-Vorpeil, A., Klapdor, R., Klemm, M., Krengel, G., Lerahn, A., Marivoet, S., Misianik, J., Ortin, V., Peeters, V., Röder, B., Schauer, I., Schneider, A., Schweiger, A.M., Seefried, D., Straetmans, D., Trommer, A., Weinhold, A.: Alpha-1-Fetoprotein (AFP): International Proficiency Study with Different Test Systems. Clin. Lab. 57 (2011) 669-675.
Reinsberg, J., Bätz, O., Bertsch, T., Bewarder, N., Deschner, W., Drescher, V., Dronsek, M., Emami, M., Keller, R., Klemm, M., Koch, H.-U., Meissner, J., Plecko, T., Schauer, I., Schweiger, A.M., Ullrich, A., Van De Loo, H.-M., Zwirner, M.: Precision and long-term stability of different Estradiol immunoassays assessed in a multi-center quality control study. Clin. Lab. 55 (2009) 201-206. [Abstract]
Demir, A.Y., Bonfrer, J.M.G., Lentjes, E.G.W.M.: Harmonisation of CEA, CA 125, CA 15-3 and CA 19-9 assay results: A pilot study within the framework of the Dutch project "Calibration 2000". Ned. Tijdschr. Klin. Chem. Labgeneesk 32 (2007) 252-254.
Bewarder, N.: CA 15-3-testing in the past and today: Comparison of two proficiency studies. Labquality News 12 (2007) 29-31. [Article]
Bewarder, N., Abmeier, F., Bergmann, S., Drohla, S., Drescher, V., Gerstmayer, A., Kuß, S., Melamies, L., Miksch, R., Ortin, V., Rietschel-Klein, A., Neumeister, V., Odarjuk, J., Stratmann, M.M., Weinhold, A., Wiesner, B., Wildbredt, D.A., Wollenberg, P., Zinsmeyer, J., Zogbaum, M., Zwerenz, P., Zwirner, M., Wood, W.G.: Multicentre Evaluation of Performance of C-Reactive Protein Analysis over a One-Year Period. Clin. Lab. 52 (2006) 639-654. [Abstract]
Hubl, W., Demant, T., Albrecht, S., Bewarder, N., Grunow, G., Keller, R., Klapdor, R., Klos, K.-J., Kruse, K., Müller, R., Päge, I., Schmidt, R., Stolle, H., Wiefelspütz, J., Vom Baur, E., Zinsmeyer, J., Zwirner, M.: A multi-center quality control study of different CA 15-3 immunoassays. Clin. Lab. 51 (2005): 641-645. [Abstract]
Zwirner, M.: Demands on reference materials for optimized quality control in tumor marker diagnosis. Labquality News 10 (2005) 40-44. [Article]
Bewarder, N., Müller, P.: External quality control program for the inter-laboratory quality control. Anticancer Res. 20 (2000) 5213-5216. [Abstract]
Renard, C., Cheminel, V., Prevosto, J. M., Soares, O., Chaulet, J.-F.: Cobas Core II: Evaluation of analytical performance and integration in the endocrine and tumor marker laboratory. Clin. Lab. 43 (1997) 843-855.
Kötting, J., Heinemann, G., Salb, I., Maier-Lenz, H.: Evaluation of the Cobas Core II immunochemistry analyser. J. Autom. Chem. 18 (1996) 205-215
Fiedler, H., Kessler, A.-C., Köhler, P.: Results of a multicentre study on the analytical reliability of the tumour markers CEA, CA 15-3, CA 19-9, CA 72-4 and CA 125. Klin. Lab. 40 (1994) 873-880.
Zwirner, M., Risse, T., Benz, R., Birkmeyer, G. D., Buchterkirche, W., Baum, U., Brandt, B., van Dalen, A., Förster, R., Hubl, W., Kapp, S., Klapdor, R., Spitz, J., Wieser, N.: Determination of CA 19-9 with various commercial assays. Results of an international proficiency study. In: R. Klapdor (ed): Current tumor diagnosis: Applications, clinical relevance, research, trends. W. Zuckschwerdt Verlag, München (1994) 481-486.
Zwirner, M.: Longitudinal quality control of tumor markers assays. Results of an international proficiency study with CEA. In: R. Klapdor (ed): Tumor associated antigens, oncogenes, receptors, cytokines in tumor diagnosis and therapy at the beginning of the nineties. W. Zuckschwerdt Verlag, München (1992) 283-290.
Zwirner, M., Bieglmayer, C., de Bruijn, H. W., Crombach, G., Ebert, G., Kreienberg, R., Kißing, F., Klietmann, W., Schmid, L., Schindler, A. E., Sturm, G., Wieser, N., Wiebecke, K., Würz, H.: Results of an international proficiency study with the SCC tumor marker. In: R. Klapdor (ed): Recent results in tumor diagnosis and therapy. W. Zuckschwerdt Verlag, München (1990) 285-289.
Birkmayer, G. J. D., Schwartz, M. K., Klavins, J. V.: Quality assurance of tumor marker assays. J. Tumor Marker Oncol. 5 (1990) 195-202.
Zwirner, M., Bieglmayer, C., Klapdor, R., Kreienberg, R., Lüthgens, M.: An international proficiency study with the tumor marker CA 125. Int. J. Biol. Markers 5 (1990) 55-60. [Abstract]
Franken, N., Jaworek, D.: Evaluierung eines neuen, automatisierten Enzym-Immunoassays zur Bestimmung von CA 15-3. Extr. Diagn. 3 (1989) 18-26.
Bieglmayer, C., Klapdor, R., Kreienberg, R., Zwirner, M.: Ergebnisse einer internationalen Ringstudie zur Qualitätssicherung der Bestimmung des tumorassoziierten Antigens CA 125. In: Tumor Diagnostik & Therapie 8 (1987) 150-155.
Zwirner, M.: Results of an international proficiency study on the quality of the tumor marker CA 153. (1987).
Fischbach, W., Mössner, J.: Do size, histology, or cytology of colorectal adenomas and their removal influence serum CEA? Dis. Colon Rectum 30 (1987) 595-599. [Abstract]
Dietel, M., Arps, H., Klapdor, R., Müller-Hagen, S., Sieck, M., Hoffmann, L.: Antigen detection by the monoclonal antibodies CA 19-9 und CA 125 in normal and tumor tissue and patients' sera. J. Cancer Res. Oncol. 111 (1986) 257-265. [Abstract]
Staab, H. J., Brümmendorf, T., Hornung, A., Anderer, F. A., Kieninger, G.: The clinical validity of circulating tumor-associated antigens CEA and CA 19-9 in primary diagnosis and follow-up of patients with gastro-intestinal malignancies. Klin. Wochenschr. 63 (1985) 106-115. [Abstract]
Klapdor, R., Klapdor, U., Bahlo, M., Dallek, M., Kremer, B., van Ackeren, H., Schreiber, H.W., Greten, H.: CA 125 bei Karzinomen des Verdauungstraktes. Ein Vergleich mit CA 19-9 und CEA bei Karzinomen des Pankreas und Kolon. Dtsch. med. Wschr. 109 (1984) 1949-1954
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