Boerma, G.J.M.

serum cholesterol control value laboratory result method sample reference study table quality blood lymphocytes procedure level quality control analysis measurement precision lymphocyte number infant standardization adult rotterdam children cb heart project lipid material survey subpopulation specimen reagent chemistry standard count patient change heart plasma variation accuracy glucose group problem interlaboratory project chern concentration calibration error kauna t lymphocytes comparison comparability factor limit deviation serum cholesterol lymphocyte subpopulations disease month 0.0 determination 0.1 difference netherland effect population growth reaction programme chapter section analyses nk cells period figure calibrator