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" ... Despite the rise of synthetic molecules to treat cancer and innovative approaches such as immunotherapies, many 'naturally-derived' chemotherapy drugs are still widely used, sometimes with great success. For example, around 90% of children now survive leukemia and found almost universally in their treatment regimens are two key drugs; vincristine and daunorubicin, which were originally isolated from the Madagascan periwinkle plant and soil bacteria, respectively. ... "
" ... Teva pharmaceuticals has announced it is resuming production of vincristine after shortages resulted ... [+] in children with cancer missing doses of the vital drug. ... "