And doctor Leo Orris has died at the age of ninety-three. He was a pioneer in environmental medicine and discovered the causative link between tobacco and cancer in 1958.
Pioneering Doctor Leo Orris, 93, Dies
HeadlineJun 17, 2009
And doctor Leo Orris has died at the age of ninety-three. He was a pioneer in environmental medicine and discovered the causative link between tobacco and cancer in 1958.