Leukemia is a long way from kidney cancer. Leukemias and lymphomas are releatively easy to cure compared to tissue cancers. And mouse studies are a long way from human studies.
I do find it rather interesting that you jumped all over me for recommending an herbal extract. Yet when it fits your need all of a sudden you post links for echinacea studies on mice using extracts.
"Results of clinical trials in humans don’t show that it can boost the immune system or fight cancer. But research is continuing into the use of Echinacea as a treatment for fighting infections and viruses."
"There is no scientific evidence to show that Echinacea can help treat, prevent or cure cancer in any way. Some therapists have claimed that Echinacea can help relieve side effects from cancer treatments such aschemotherapy and radiotherapy. But this hasn’t been proved either. "