RT Journal Article SR Electronic T1 Exposure assessment should be integrated in studies on the prevention and management of occupational asthma JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 149 OP 150 DO 10.1136/oem.2005.024711 VO 65 IS 3 A1 Dick Heederik A1 Frits van Rooy YR 2008 UL http://oem.bmj.com/content/65/3/149.abstract AB