4. Subjects must meet the Southwest Oncology Group performance status criteria of 0 - 1 (0= fully active, able to carry on all pre-disease activities without restriction [Karnofsky scale 90 - 100]; 1 = restricted in physically strenuous activity, but ambulatory and able to carry out work of a light or sedentary nature, i.e. light housework or office work [Karnofsky scale 70 - 80]).