... hospitals in Shanghai, Beijing, and otherareas in China, with a total 189 patients. The double-blind study used the same doses and test materials as the previous study, and ex-amined PSP against the ... nonetheless, the findings are marked and support the use of PSK in breast cancer. In 1992, a large randomized trial evalu-ated tamoxifen as an addition to the then-con-ventional chemotherapy, and ... retrospective analysis of their successwith combined radiation, chemotherapy, and immunotherapy in 133 cases.38 They con-cluded the addition of immunotherapy to the regimen using either PSK or OK-432...