Correspondence to: Dr K Radon, Unit for Occupational and Environmental Epidemiology & Net Teaching, Institute and Outpatient Clinic for Occupational and Environmental Medicine, Ziemssenstr. 1, 80336 Munich, Germany; katja. [email protected] _________________________ E ndotoxins, part of the outer membrane of Gram negative bacteria, are a potent inducer of neutrophilic airway inflammatio...