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An aliquot of each density gradient fraction was directly plated onto microtiter well plates and assessed for the presence of apoB, apo(a), OxPL, or Lp-PLA2 pre- and postapheresis in the low Lp(a), intermediate Lp(a), and high Lp(a) groups. Due to lower values, the scale is different for Lp-PLA2. Each of the 25 individual data points pre- and postapheresis represents the mean of six patients.
