4. 下列何種情況常會造成partial thromboplastin time延長？a.von Willebrand diseaseb.thrombotic thrombocytopenic purpurac.antiphospholipid antibody syndromed.factor VIII inhibitore.heparin treatment
(A) d
(B) d+e
(C) a+d
(D) a+c+d+e
(E) a+b+c+d+e

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