Information contained on this page is provided by NewsUSA, an independent third-party content provider. WorldNow and this Station make no warranties or representations in connection therewith.(NewsUSA/National Children's Cancer Society) - Once childhood cancer patients have been declared cancer-free, most are not completely out of the woods. More than 60 percent of childhood cancer survivors experience late effects of cancer treatment resulting in chronic conditions. The New England Journal of Medicine says nearly half of all late effects are severe, life threatening or disabling.