The study was “well conducted,” says Humberto Choi, a pulmonologist at the Cleveland Clinic in Ohio. But for him, it doesn’t provide sufficient evidence to use vaping as a smoking cessation treatment. He points out that 80 percent of people in the e-cigarette group were still vaping after a year, while only 9 percent of those who quit using other methods were still using their cessation products. The study participants used e-liquid with a concentration of 18 milligrams per milliliter, but Juul…