John Henry is a professor specializing in toxicology in the Faculty of Medicine, Imperial College London, at St Mary's Hospital. He has done research on the health effects of cannabis, cocaine, and other recreational drugs.
This article is licensed under the GNU Free Documentation License.
It uses material from the 
"John Henry (toxicologist)".
Home Page • arts • business • computers • games • health • hospitals • home • kids & teens • news • physicians • recreation• reference • regional • science • shopping • society • sports • world