Some e cigarettes contain chemicals that cause popcorn lung Vox E cigarettes cause lung cancer in mice, finds first study tying vaping to cancer Vapers May Be Less Likely to Undergo Lung Cancer Screening MedPage Today Vaping and smoking together increases lung cancer risk fourfold Clinical Oncology Society of Australia concludes E cigarettes are likely to cause lung cancer and oral cancer Stanton Glantz blog Vaping to quit ciggies ups lung cancer risk Allergy & Respiratory Republic