Causes of double-negative T-cell lymphocytosis in children and adults Konstantinos Liapis1, Nikolaos J Tsagarakis2, Fotis Panitsas3, Anna Taparkou4, Ioannis Liapis5, Christophoros Roubakis6, Dimitris Tsokanas1, Paraskevi Vasileiou7, Eirini Grigoriou8, Georgios Kakiopoulos9, Katerina Psarra8, Evangelia Farmaki4, George Paterakis2 1Department of Clinical Haematology, Peripheral General Hospital Athens Giorgos Gennimatas, Athens, Greece 2Department of Immunology, Peripheral General Hospital...