With all the other causes of preventable deaths, alcohol, illegal drugs, AIDS, suicide, transportation accidents, fires, and guns, cigarettes still account for more preventable deaths than those do combined,
3 questions
1. What's the meaning of 'with' in the beginning of the sentence?
2. What's the meaning of "cigarettes still account for more preventable deaths"?
3. "those do combined", Is do mandatory?
Thanks in advance!