Perrotta C, Kleefeld S, Staines A, Tewari P, De Roos AJ, Baris D, Birmann B, Chiu B, Cozen W, Becker N, Foretova L, Maynadié M, Nieters A, de Sanjosé S, Miligi L, Seniori Costantini A, Purdue M, Spinelli J, Cocco P. Multiple myeloma and occupation: a pooled analysis by the International Multiple Myeloma Consortium. Cancer Epidemiol. 2013 Jun; 37(3):300-5.