CANCER, vol.88, no.9, pp.2033-2036, 2000 (SCI-Expanded)
BACKGROUND. Hematopoietic growth factors (HGFs) have been used to reduce the neutropenic complications of cytotoxic chemotherapy so that higher doses may be given. The authors have previously shown that endogenous serum granulocyte-colony stimulating factor (G-CSF) and granulocyte-macrophage-colony stimulating factor (GM-CSF) levers at night (p.m.) were significantly higher than those in the morning (a.m.).