Authors: Klasen, IS Goertz, JHC van de Wiel, GAS Weemaes, CMR van der Meer, JWM Drenth, JPH

Citation: Is. Klasen et al., Hyper-immunoglobulin A in the hyperimmunoglobulinemia D syndrome, CL DIAG LAB, 8(1), 2001, pp. 58-61

Authors: Schrijver, IA De Man, YA Melief, MJ Van Laar, JM Markusse, HM Klasen, IS Hazenberg, MP Laman, JD

Citation: Ia. Schrijver et al., Reduced systemic IgG levels against peptidoglycan in rheumatoid arthritis (RA) patients, CLIN EXP IM, 123(1), 2001, pp. 140-146

Authors: Hordijk, W Klasen, IS de Keijzer, MH Branten, AJW Wetzels, JFM

Citation: W. Hordijk et al., Pseudoproteinuria following gelatin infusion, NEPH DIAL T, 14(11), 1999, pp. 2782-2783

Authors: de Keijzer, MH Klasen, IS Branten, AJW Hordijk, W Wetzels, JFM

Citation: Mh. De Keijzer et al., Infusion of plasma expanders may lead to unexpected results in urinary protein assays, SC J CL INV, 59(2), 1999, pp. 133-137

Authors: Klasen, IS Reichert, LJM Angelino, CMD Wetzels, JFM

Citation: Is. Klasen et al., Quantitative determination of low and high molecular weight proteins in human urine: Influence of temperature and storage time, CLIN CHEM, 45(3), 1999, pp. 430-432