The jury is still out on this one....there are too many variables involved to nail it down to one specific thing. Case in point I have an uncle whom I affectionately call "Zorro" who chain smokes unfiltered Camels and has for the past 60 years. The VA thinks his lungs are bionic because when they went in to remove a mass from his lung there was no sign of cancer what so ever.

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"It's normal for these things to empty your wallet and break your heart in the process."
2012 SLK 350
1987 420 SEL