david dodick, md, neurologist, mayo clinic; chairman, american migraine foundation.. november 2017 (22). january 2015 (25)..."in contrast, a mechanical mod is unregulated and works simply by drawing the power of a battery to an atomizer," he said. . my profile.sign out.
"in contrast, a mechanical mod is unregulated and works simply by drawing the power of a battery to an atomizer," he said. . my profile.sign out.