Drs. David Niesel and Norbert Herzog write about the possible health effects of smoking marijuana. A recent study found periodontal disease as the only physical health problem from long-term marijuana use. There were some short-term effects: memory impairment, decreased motor coordination, among other things, wrote Niesel and Herzog. “These are somewhat unexpected findings with many assuming that long-term marijuana use would have more adverse effects,” they wrote. [Note: Paid subscription required. Contact UTMB Media Relations for details.]