... main chains and 1-4 branchings, and the more common 1-3main chains and 1-6 branchings.18 This frac-tion also is highly active in vitro and in animalmodels of cancer, although activity in ... cancers are certainly clini-cally meaningful. Used singly or in combina-tion, PSK and PSP have the potential to ex-tend survival. It may prove instructive, for pro-ponents and skeptics alike, ... hospitals in Shanghai, Beijing, and otherareas in China, with a total 189 patients. Thedouble-blind study used the same doses and test materials as the previous study, and ex-amined PSP against...