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. 2018 Jul 20;9:1678. doi: 10.3389/fimmu.2018.01678

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Copyright © 2018 Truglia, Capozzi, Mancuso, Recalchi, Spinelli, Perricone, De Carolis, Manganelli, Riitano, Garofalo, Longo, De Carolis, Alessandri, Misasi, Valesini, Sorice and Conti.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The concordance of the autoantibodies positivity, between first and second test, in obstetrical seronegative anti-phospholipid syndrome followed up where the tests were repeated on two occasions. For thin-layer chromatography (TLC)-immunostaining and anti-cardiolipin/vimentin (aCL/Vim) a “substantial agreement” was found between first and second test, revealed by Cohen’s kappa test (K = 0.696 and K = 0.789).