‘Twitter Doctors’ Lists Medical Kings of Social Media

‘Twitter Doctors’ Lists Medical Kings of Social Media: "Twitter Doctors is a new online directory that is trying to rank all of the doctors with Twitter accounts, putting the ones with the highest influence score at the top. The directory also lists the number of tweets, followers, and retweets each doctor has. However, the site’s usefulness isn’t all that clear. What does the site actually tell us about these doctors?"