17. General Medical Exclusions 1) Inability to comply with study and/or follow-up procedures 2) Life expectancy of less than 6 weeks 3) Current, recent (within 4 weeks of the first infusion of this study), or planned participation in an experimental drug study other than this Genentech supported study 4) Active malignancy, other than superficial basal cell and superficial squamous (skin) cell, or carcinoma in situ of the cervix within the last 5 years