In 1986, Dr. Fernandez and his colleagues reported the first case of aggressive NK-cell leukemia.  In 1989, Dr. Kawa and his colleagues first reported the association between EBV virus and aggressive NK-cell leukemia.
What does the term NK-cell leukemia mean?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What does the term NK-cell leukemia mean? [/INST] \n In 1986, Dr. Fernandez and his colleagues reported the first case of aggressive NK-cell leukemia.  In 1989, Dr. Kawa and his colleagues first reported the association between EBV virus and aggressive NK-cell leukemia.</s>