RT Journal Article SR Electronic T1 Intense exercise and airway hyper-responsiveness/asthma—importance of environmental factors JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 379 OP 380 DO 10.1136/bjsports-2012-090948 VO 46 IS 6 A1 Ken Fitch A1 Sandra Anderson YR 2012 UL http://bjsm.bmj.com/content/46/6/379.abstract AB