Exposure biomarkers and risk from gluing and heating of polyurethane: a cross sectional study of respiratory symptoms
M. Littorin, L. Rylander, G. Skarping, M. Dalene, H. Welinder, U. Stromberg, and S. Skerfving
Occup Environ Med. 2000 June; 57(6): 396–405. doi: 10.1136/oem.57.6.396.PMCID: PMC1739970