Even as medical marijuana becomes more widespread, there's little science to show it works - TBO.com

TBO.comEven as medical marijuana becomes more widespread, there's little science to show it worksTBO.comMore and more Americans are turning to marijuana to treat a range of conditions, hoping to shrink cancerous tumors, halt epileptic seizures or manage chronic pain. But even though half the states and the District of Columbia have broadly legalized ...and more »