E cigarettes increase the risk of adenoma formation in murine colorectal cancer model bioRxiv EHE Researchers Find Thousands of Unknown Chemicals in E Cigarettes Johns Hopkins Bloomberg School of Public Health Pod based e cigarettes may foster greater nicotine dependence Harvard Gazette Health warning: Now e cigarettes can give you malware Malware The Guardian Study: e cigarette users with substances linked to bladder cancer in urine Probable carcinogens found in e cigarette vapour Research Chemistry World