Serum interleukin-12 (IL-12), interferon-gamma (IFN-γ), and inducible protein-10 (IP-10) before and after the first dose of subcutaneous 300 ng/kg IL-12, a dose at week 18, and a dose at week 34. Patients 1 to 3 at week 18 and patients 7 and 8 at week 34 received 300 ng/kg IL-12; the others received 500 ng/kg.