You probably played the Kevin Bacon game at some point in your life. Someone names an actor and you have to connect that actor back to Kevin Bacon through other actors who have worked together. The theory goes that we are all connected by six degrees of separation or less. I know someone who knows someone, who knows someone, who knows someone, who knows someone, who knows someone, who knows you.
Scientists are now looking at social networks in the world of health behavior. An old Russian
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