There is no doubt that the reader not only focused platelet count but also antiplatelet antibody
response in his study  but my sentence in the article  "In brief, to date, virtually all of the randomized clinical trials conducted in children with ITP have focused on platelet counts as the sole outcome measure" was just to put emphasize that the response outcome measured was not the clinical improvement but it was just improvement in platelet count.
An enzyme immunoassay employs a PF4-heparinoid complex as the solid-phase target antigen for the heparin-dependent antiplatelet antibody
A monoclonal antiplatelet antibody
, developed by researchers at Massachusetts General Hospital in Boston and the State University of New York at Stony Brook (SUNY), binds to a receptor on the platelet and blocks a necessary step in that clotting process.
The authors hypothesized that the close temporal relationship of the skin reactions after administration of the vaccines could have resulted from an increase in antiplatelet antibody
production, leading to a relapse of their immune thrombocytopenia.
14) We did not test for antibodies against platelets in her serum; however, the antiplatelet antibody
assay has a predictive value of only 46% and a negative predictive value of 82%.