TY - JOUR T1 - Genetic and environment in asthma: the answer of twin studies JF - European Respiratory Journal JO - Eur Respir J SP - 2 LP - 4 DO - 10.1183/09031936.99.13100299 VL - 13 IS - 1 AU - GH Koppelman AU - H Los AU - DS Postma Y1 - 1999/01/01 UR - http://erj.ersjournals.com/content/13/1/2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -