Occupational exposures and squamous cell carcinoma of the oral cavity, pharynx, larynx, and oesophagus: a case-control study in Sweden
P. Gustavsson, R. Jakobsson, H. Johansson, F. Lewin, S. Norell, and L. E. Rutkvist
Occup Environ Med. 1998 June; 55(6): 393–400. PMCID: PMC1757595