RT Journal Article SR Electronic T1 Bed-sharing and childhood asthma: from associations to causal modelling JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 596 OP 600 DO 10.1183/09031936.00234814 VO 45 IS 3 A1 Alban Ramette A1 Claudia Elisabeth Kuehni YR 2015 UL http://erj.ersjournals.com/content/45/3/596.abstract AB