RT Journal Article SR Electronic T1 Community violence and urban childhood asthma: a multilevel analysis JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00003010 A1 M.J. Sternthal A1 H-J. Jun A1 F. Earls A1 R.J. Wright YR 2010 UL http://erj.ersjournals.com/content/early/2010/04/22/09031936.00003010.abstract AB