Awakening the sleeping/cancer-protecting angels in mutant p53-expressing human tumors: Emodin, isolated from Rhubarb and others,  increases the expression of tumor suppressors genes, such as KISS1, TCF21, TA-p73, TAp63, p53, and others, induces regression of p53-mutated human tumors, via down-regulation of its target gene, 6/August/2018, 2.18 pm