B4.Volkan S, Köksal I, Aydın K, Çaylan R, Öksüz R. Infectious causes in febrile neutropenia episodes of hematological cancer patients. 3rd International Symposium on Febrile Neutropenia. Abstract book 62, Belgium1997.
B5. Aydın K, Köksal İ, Çaylan R, Volkan S, Öksüz R. Prospective responses to recombinant hepatitis B vaccination applied by two different immunization schedules in Turkish population. 8th International Congress on Infectious Diseases, P.54.015, Boston, Massachusetts, USA, May 15 to 18, 1998.
B6. Çaylan, R. Aydın, K. Köksal, İ. Öksüz, R. Kostakoğlu, U. Efficacy of interferon alfa therapy in chronic hepatitis B in Turkish population: A long-term follow-up trial. 8th International Congress on Infectious Diseases, P.92.030, Boston, Massachusetts, USA, May 15 to 18, 1998.