Kaur – Current Perspectives on Characteristics, Compositions, and Toxicological Effects of E-Cigarettes -fphys-11-613948 Front Physiol 2020 Current Perspectives on Characteristics, Compositions, and Toxicological Effects of E-Cigarettes Containing Tobacco and Menthol/Mint Flavors Gurjot Kaur, Anshuman Gaurav, Thomas Lamb, Melanie Perkins, Thivanka Muthumalage and Irfan Rahman