00425nas a2200157   4500000000100000000000100001008004100002100001600043700001500059700001300074700001600087245013100103300001200234490000700246022001400253       2010                            d1 aF. de Vries1 aE. Setakis1 aB. Zhang1 aT. van Staa00aLong-acting beta2-agonists in adult asthma and the pattern of risk of death and severe asthma outcomes: a study using the GPRD  a494-5020 v36  a0903-1936