D Michal Freedman, Shelia Hoar Zahm, Mustafa Dosemeci
Freedman D M, Zahm S H, Dosemeci M.
Residential and occupational exposure to sunlight and mortality from non-Hodgkin's lymphoma: composite (threefold) case-control study
BMJ 1997; 314 :1451
doi:10.1136/bmj.314.7092.1451