TY - JOUR T1 - Correction JF - BMJ Open Respiratory Research JO - BMJ Open Resp Res DO - 10.1136/bmjresp-2014-000025corr1 VL - 1 IS - 1 SP - e000025corr1 A2 - , Y1 - 2014/05/01 UR - http://bmjopenrespres.bmj.com/content/1/1/e000025corr1.abstract N2 - Kurmi OP, Li L, Smith M, et al. Regional variations … ER -