Paul H. E. Meijer

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The laboratory criteria of the antiphospholipid syndrome include one coagulation assay (lupus anticoagulant [LA]) and two solid phase assays (anticardiolipin [aCL] and anti-ß(2)glycoprotein I antibodies [aß(2)GPI]). External quality control (EQC) surveys show that negative and clearly positive LA samples are classified correctly by about 95% of(More)
The comparability of test results for protein S between laboratories is hampered by a high inter-laboratory variability. The effect of the use and type of common reference plasma on the inter-laboratory variability of the total and free protein S measurement was evaluated. The results of 10 plasma samples measured against a centrally distributed frozen(More)
a sensitivity analysis for GOCE Proefschrift ter verkrijging van de graad van doctor Dit proefschrift is goedgekeurd door de promotoren: Acknowledgements This thesis reflects the outcome of many years of research and I would like to thank the following people for their support during this period: • everyone who helped me getting back on track after my(More)
In a previous study, a between-operator variability (CVOBETWEEN) of 9.6% and 15.0%) was observed for total protein S antigen assays in 11 laboratories using a frozen or lyophilized reference plasma, respectively, and the need to standardize the use of lyophilized reference plasma was identified. The aim of the present study was to identify further(More)
BACKGROUND Several small studies showed that the WPC (white precursor cell) channel in the Sysmex haematology analyser for leukocyte differentiation analysis leads to a significant reduction of microscopic blood smears. We determined the added value of the WPC channel for blood smear reduction in a large teaching hospital and whether this reduction was(More)
The density-density plot of the critical lines of the van der Waats equation at the van Laar point is analyzed through its algebraic properties. It is shown that this curve is an irreducible expression of the fifth degree of genus one. In addition , we show the topology of the second branch, i.e., the T= 0 solution, which will interact with the first branch(More)
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