With as many as 22 percent of U.S. college studenst having at least one tattoo, half of those try to have the tattoo removed later. Of 352 people getting a tattoo removed with the Q-switched tattoo removal laser, under half of those were successfully removed after 10 sessions, and still only 75 percent after 15 sessions, according to the study led by Luigi Naldi, from Centro Studi GISED in Bergamo,...