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"Mapped out on the screen, the story became clear: The medical community was actually divided into two sub-networks split apparently by ethnicity, with one sub-network dominated by physicians with mostly Asian names and the other with mostly European names.
Connecting the two, like a spider suspended on a thread between two webs, was the dot for Physician No. 184 - a doctor the company's marketing department and salespeople barely knew". Interesting study on the value of social networks and why Super Connectorsare so important.