Responses and clinical course during the trial period. Swimmer plots showing the clinical course of each patient during the trial. CR: disappearance of all of symptoms of disease activity, including fever, liver dysfunction, uveitis, progressive skin lesions, and vasculitis; PR: disappearance of at least 1 of the symptoms listed above; SD: no disease progression; PD: conversion to active disease, exacerbation of active disease, or development of overt T-cell or NK-cell lymphoma; vCR: a CR with a WB EBV-DNA of <10^2.5 copies per μg DNA.