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  1. Quitting smoking: 10 ways to resist tobacco cravings

  2. Nicotine dependence - Symptoms and causes - Mayo Clinic

  3. Erectile dysfunction - Symptoms and causes - Mayo Clinic

  4. Quit smoking Quit-smoking basics - Mayo Clinic

  5. Lung cancer - Symptoms and causes - Mayo Clinic

  6. Cataracts - Symptoms and causes - Mayo Clinic

  7. Emphysema - Symptoms and causes - Mayo Clinic

  8. Wrinkles - Symptoms and causes - Mayo Clinic

  9. Sudden infant death syndrome (SIDS) - Symptoms and causes

  10. Aging: What to expect - Mayo Clinic