RT Journal Article SR Electronic T1 β2 adrenoceptor polymorphisms (ADRB2 gene) are not strongly associated with asthma incidence or prevalence JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 28 OP 28 VO 62 IS 1 A1 Pagaria, M YR 2007 UL http://thorax.bmj.com/content/62/1/28.abstract AB