`  == Rise of E-Cig use and fall of tobacco use ==  @DocJames: I'm a little bit confused... You've changend my contribution in that way, that only the rise of E-Cig use is left over. You have written yesterday: ``One also needs to look at if they decrease cig usage or increase cig use in society as a whole.`` So: Why do you delete a contribution, that is dealing precisely with that topic?  `