4 Imaoberta Keller of Sunnyvale says her vaporizer has helped her quit her longtime cigarette habit: “I really think it’s a psycho logical thing.” Roberta Keller tried everything she could think of to kick her pack-and-a-half habit of more than 50 years — gum, patches, medication, even an experimental drug through a Stanford University clinical trial — but nothing helped her quit smoking for longer than three months. Then a friend told her about “this vaping thing.” After a little research, the 72-year-old Sunnyvale woman bought an electronic cigarette device and experimented with the different liquids, called e-juices, the device...
