PRIOR CONCURRENT THERAPY: Biologic therapy: No other concurrent hematopoietic growth factors Chemotherapy: No prior chemotherapy Endocrine therapy: Not specified Radiotherapy: At least 2 weeks since prior radiotherapy and recovered Surgery: At least 2 weeks since prior major thoracic or abdominal surgery and recovered At least 6 months since prior coronary angioplasty Other: At least 30 days since prior investigational agents No other concurrent investigational agent No prophylactic acetaminophen for fever