PT - JOURNAL ARTICLE AU - J-F. Etter AU - C. Bullen TI - Saliva cotinine levels in users of electronic cigarettes AID - 10.1183/09031936.00066011 DP - 2011 Nov 01 TA - European Respiratory Journal PG - 1219--1220 VI - 38 IP - 5 4099 - http://erj.ersjournals.com/content/38/5/1219.short 4100 - http://erj.ersjournals.com/content/38/5/1219.full SO - Eur Respir J2011 Nov 01; 38