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. Author manuscript; available in PMC: 2013 Mar 23.
Published in final edited form as: J Thromb Thrombolysis. 2008 Mar 28;26(1):55–61. doi: 10.1007/s11239-008-0217-y

Fig. 1.

Fig. 1

ELISA results for 15 seropositive healthy subjects with available data, as determined by the Stago PF4/heparin ELISA (n = 14) and GTI PF4/PVS ELISA (n = 1). Normality cut-off values for the respective ELISAs (OD492 ≥ 0.5 and OD405 ≥ 0.4) are shown as horizontal, dashed lines. OD values were extracted from published figures [16, 17, 20]. For the seven ELISA-positive subjects further tested for platelet-activating antibody (eachfound to be negative), OD values are shown as open squares