Association between district-level perceived safety and self-rated health: a multilevel study in Seoul, South Korea
Seung-Sup Kim, Jaesung Choi, Kisoo Park, Yeonseung Chung, Sangjo Park, Jongho Heo
BMJ Open Jul 2014, 4 (7) e004695; DOI: 10.1136/bmjopen-2013-004695