There's Life After Radiation for Brain Cells - 08/12/2013. There's Life After Radiation for Brain Cells. Scientists have long believed that healthy brain cells, once damaged by radiation designed to kill brain tumors, cannot regenerate.
Pew Research Center. The Pew Research Center is a nonpartisan American fact tank, which is based in Washington, D.C. It provides information on social issues, public opinion, and demographic trends shaping the United States and the world.
Pew Research Center also has conducted internet surveys of random samples of elite and special populations, where a list of the population exists and can be used to draw a random sample. Then, the sampled persons are asked to complete the survey online or by other modes.