Can worry kill?

Can someone make themselves deathly ill by worry? Can they have food poisoning systems, such as upset stomach and pains in their belly and other gross things I would rather not mention in this G rated blog? And can someone actually die because of their worrisome thoughts? Hmm, if worrying can kill, how does someone innocently and not purposely start the chain of events that will eventually lead to someone's death? If anyone has any thoughts or examples of foil proof worry starters that will not lead to the instigator, comment on this blog using Danish Butter Cookies as code. And unless you want to die, don't worry so much over things you can't control.