Dose-response relations for sensory effects caused by airborne office dust with added Glucan

Materials and Methods A controlled experimental exposure of human subjects simulating a worse case scenario in the sense that the dust concentrations were in the higher range of what is normal for indoor air and the dust had been added a known biological active compound (Glucan) at concentrations known indoors. The study design was a cross over design (4x4 Latin) including clean air placebo exposures. Subjects were their own controls through baseline measurements in clean air each morning before exposures.