Evidence update on the cancer risk of vaping e cigarettes: A systematic review Oviedo couple works to make e cigs safer West Orange Times & Observer Lung cancer risks persist with e cigarette use after quitting tobacco smoking We were shocked': Vaping considerably increases lung cancer risk among people who smoke Propylene glycol hi res stock photography and images Alamy Electronic cigarette aerosols alter the expression of cisplatin transporters and increase drug resistance in oral cancer cells Scientific Reports