- Arm I: Patients receive a sensitizing dose of keyhole limpet hemocyanin (KLH) intradermally at week -2 followed by induction KLH IV once weekly at weeks 1-6. Patients with partial or no response receive IV KLH reinduction therapy once weekly at weeks 13-18. Patients with complete response receive IV KLH maintenance therapy monthly at weeks 13, 17, and 21, and then at months 6-12.