Travel both to "hospitals" and "medical centers" in tweets
Lines between where someone tweeted "I'm at…Hospital" or "I'm at…Medical Center" and where their previous geotagged tweet was. Brian Mount's doctor said told him that people prefer doctors north of them to doctors south of them.
A lot of people seem to go to Stanford Hospital from San Francisco.
(2158 pairs of tweets through June 18, 2012)