UM: Marijuana

The Boston Globe reports on the pros and cons of medical marijuana, and quotes Hal Morgenstern, an epidemiologist at UM’s School of Public Health: ”We had hypothesized, based on prior laboratory evidence, including animal studies, that long-term heavy use of marijuana would increase the risk of lung and head and neck cancers. But we didn’t get any evidence of that, once we controlled for confounding factors, especially cigarette smoking.” [Source]