is arsenic in cigarettes and Cadmium Cigar Fillers: A Comparative Study within Cigar Types and with Arsenic species in electronic cigarettes:
Description
Of course, this study is only looking at death, specifically, as a risk associated with marijuana

As you near the end of your session, you'll notice the glass tips effectively regulating temperature, shielding your lips and fingers from burns
Effects of prenatal exposure to cigarette smoke on offspring tumor susceptibility and associated immune mechanisms
ISBN 978-92-832-1323-9
