An area’s level of poverty or wealth may affect the distribution of cancer types — ScienceDaily
source : http://www.sciencedaily.com/releases/2014/05/140527100641.htm
source : http://www.sciencedaily.com/releases/2014/05/140527100641.htm
source : http://www.sciencedaily.com/releases/2014/02/140210083237.htm