ahlam1399
08-28-2019, 11:04 PM
Every year, an estimated 3,400 children in the United States are diagnosed with a brain tumor or brain cancer. Approximately one third of these children will survive no more than five years, making brain and spinal cord tumors the deadliest of all childhood cancers.
أكثر... (http://EzineArticles.com/5652847)
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