Fig. 2From: Korean childhood asthma study (KAS): a prospective, observational cohort of Korean asthmatic childrenThe 19 hospitals participating in the Korean childhood Asthma Study (KAS). The original shapefile of the map is from Wikimedia Commons (South_Korean_presidential_election_2007.svg licensed with Cc-by-sa-3.02012–11-23 T04:30:57Z)Back to article page