<p>Online resource 2 - List of excluded articles with reasons</p><p>Excluded articles Reason for exclusion Adzersen KH, et al. Cancer mortality in a cohort of male German iron foundry workers. Am J Ind Med. SMR based on estimated number of 2003;43(3):295-305. deaths instead of observed deaths Ahn YS, et al. Cancer morbidity in iron and steel workers in Korea. Am J Ind Med. 2006 Aug;49(8):647- Cohort overlapping with Park et al. 57. 2005 Ahn YS, et al. Cancer morbidity of foundry workers in Korea. J Korean Med Sci. 2010 Dec;25(12):1733- Cohort overlapping with Park et al. 41 2005 Aminian O, et al. Evaluation of Occupational Risk Factors in Non-Hodgkin Lymphoma and Hodgkin's Occupational activity not defined or Disease in Iranian Men Iran J Cancer Prev. 2012;5(4):189-93. different from those analyzed in the meta-analysis Andersen A, et al. Risk of cancer in the Norwegian aluminium industry. Int J Cancer. 1982;29(3):295-8. Cohort overlapping with Romunstad et al. 2000 Behrens T,et al. Elevated cancer mortality in a German cohort of bitumen workers: extended follow-up Lymphatic and hematopoietic through 2004. J Occup Environ Hyg. 2009;6(9):555-61. neoplasms not evaluated Bergdahl IA, et al. Cancer morbidity in Swedish asphalt workers. Am J Ind Med. 2003;43(1):104-8. Cohort overlapping with Boffetta et al. 2003 Boffetta P, et al. Cancer mortality among European asphalt workers: an international epidemiological Lymphatic and hematopoietic study. II. Exposure to bitumen fume and other agents Am J Ind Med. 2003 Jan;43(1):28-39. neoplasms not evaluated Carta P, et al. [Mortality in workers of a primary aluminum foundry in Portovesme in Sardinia] Med Lav Data duplication of the study by Carta 1992;83(5):530-535] et al. 2004 Carta P, et al. Mortality among primary aluminium foundry workers in Sardinia Med Lav. 1992 Sep- Data duplication of the study by Carta Oct;83(5):530-5. et al. 2004 Chau N, et al. Mortality in retired coke oven plant workers. Br J Ind Med. 1993;50(2):127-35. Lymphatic and hematopoietic neoplasms not evaluated Coggon D, et al. Work-related mortality in England and Wales, 1979-2000. Occup Environ Med. Occupational activity not defined or 2010;67(12):816-22. different from those analyzed in the meta-analysis Egan et al. A preliminary report of mortality patterns among foundry workers. J enviromental Pathol Study from death certificates Toxicol. 1977;2:259–72. Ghosh S, et al. Multiple myeloma and occupational exposures: a population-based case-control study. J Occupational activity not defined or Occup Environ Med. 2011 Jun;53(6):641-6. different from those analyzed in the meta-analysis Gibbs GW, et al. Mortality and cancer experience of Quebec aluminum reduction plant workers. Part 2: Cohort overlapping with Gibbs et al. mortality of three cohorts hired on or before january 1, 1951. J Occup Environ Med. 2007;49(10):1105- 2014 23. Gibbs GW, Sevigny M. Mortality and cancer experience of Quebec aluminum reduction plant workers, Cohort overlapping with Gibbs et al. part 4: cancer incidence J Occup Environ Med. 2007;49(12):1351-66. 2014 Gibbs GW, Sevigny M. Mortality and cancer experience of Quebec aluminum reduction plant workers. Cohort overlapping with Gibbs et al. Part 3: monitoring the mortality of workers first employed after January 1, 1950 J Occup Environ Med. 2014 2007;49(11):1269-87. Gibbs GW. Mortality of aluminum reduction plant workers, 1950 through 1977. J Occup Med. Cohort overlapping with Gibbs et al. 1985;27(10):761-70. 2014 Giua R, et al. [Cancer risk for coke-oven workers in the Taranto steel plant]. Epidemiol Prev. 2005;29(5-6 Lymphatic and hematopoietic Suppl):42-4. neoplasms not evaluated Hansen ES. Cancer incidence in an occupational cohort exposed to bitumen fumes. Scand J Work Environ Cohort overlapping with Boffetta et al. Health. 1989;15:101-5. 2003 Hansen ES. Cancer mortality among Danish molders. Am J Ind Med. 1991;20(3):401-9. Lymphatic and hematopoietic neoplasms not evaluated Hansen ES. Cancer mortality in the asphalt industry: a ten year follow up of an occupational cohort. Br J Lymphatic and hematopoietic Ind Med. 1989 Aug;46(8):582-5. neoplasms not evaluated Hansen ES. Mortality of mastic asphalt workers. Scand J Work Environ Health. 1991 Feb;17(1):20-4. Lymphatic and hematopoietic neoplasms not evaluated Hurley JF, et al. The mortality of coke workers in Britain. Am J Ind Med. 1983;4(6):691-704. Lymphatic and hematopoietic neoplasms not evaluated Kauppinen T, et al. Mortality and cancer incidence of workers in Finnish road paving companies. Am J Cohort overlapping with Boffetta et al. Ind Med. 2003;43(1):49-57. 2003 Koskela RS, et al. A mortality study of foundry workers. Scand J Work Environ Health. 1976;2 Suppl Lymphatic and hematopoietic 1:73-89. neoplasms not evaluated Lewis RJ, et al. Mortality and cancer morbidity in a cohort of Canadian petroleum workers Occup Environ Occupational activity not defined or Med. 2003;60(12):918-28. different from those analyzed in the meta-analysis Maclaren WM, Hurley JF. Mortality of tar distillation workers. Scand J Work Environ Health. Lymphatic and hematopoietic 1987;13(5):404-11. neoplasms not evaluated Minder CE, Beer-Porizek V. Cancer mortality of Swiss men by occupation, 1979-1982. Scand J Work Lymphatic and hematopoietic Environ Health. 1992;18 Suppl 3:1-27. neoplasms not evaluated Moulin JJ, et al. A mortality study among workers in a French aluminium reduction plant. Int Arch Occup Cohort overlapping with Mur JM et al. Environ Health. 2000;73(5):323-30 1987 Nadon L, et al. Cancer risk due to occupational exposure to polycyclic aromatic hydrocarbons. Am J Ind Occupational activity not defined or Med. 1995;28(3):303-24. different from those analyzed in the meta-analysis Randem BG, et al. Cancer incidence among male Norwegian asphalt workers. Am J Ind Med. Cohort overlapping with Boffetta et al. 2003;43(1):88-95. 2003</p><p>1 Randem BG, et al. Cancer incidence of Nordic asphalt workers. Scand J Work Environ Health. Cohort overlapping with Boffetta et al. 2004;30(5):350-5. 2003 Redmond CK. Cancer mortality among coke oven workers. Environ Health Perspect. 1983;52:67-73. Lymphatic and hematopoietic neoplasms not evaluated Redmond, et al. Long-term mortality study of steelworkers. VI. Mortality from malignant neoplasms Data duplication of the study by among coke oven workers J Occup Med. 1972 Aug;14(8):621-9. Redmond et al. 1972 Romundstad P, et al. Cancer incidence and cause specific mortality among workers in two Norwegian Cohort overlapping with Boffetta et al. aluminum reduction plants. Am J Ind Med. 2000;37(2):175-83. 2003 Rønneberg A, Andersen A. Mortality and cancer morbidity in workers from an aluminium smelter with Cohort overlapping with Romunstad et prebaked carbon anodes--Part II: Cancer morbidity. Occup Environ Med. 1995;52(4):250-4. al. 2000 Rønneberg A, et al. Occupational exposure and cancer incidence among workers from an aluminum Cohort overlapping with Romunstad et smelter in western Norway Scand J Work Environ Health. 1999;25(3):207-14. al. 2000 Rönneberg A, Langmark F. Epidemiologic evidence of cancer in aluminum reduction plant workers. Am J Cohort overlapping with Romunstad et Ind Med. 1992;22(4):573-90. al. 2000 Rushton L, et al. Occupation and cancer in Britain. Br J Cancer. 2010 Apr 27 Occupational activity not defined or different from those analyzed in the meta-analysis Schenk M, et al. Occupation/industry and risk of non-Hodgkin's lymphoma in the United States Occup Occupational activity not defined or Environ Med. 2009;66(1):23-31. different from those analyzed in the meta-analysis Shaham J, et al. Epidemiologic study of cancer mortality among Israeli asphalt workers. Am J Ind Med. Cohort overlapping with Boffetta et al. 2003;43(1):69-78. 2003 Silverstein et al. Mortality among workers exposed to coal tar pitch volatiles and welding Study from death certificates emissions: An exercise in epidemiologic triage. Am J Public Health. 1985;75(11):1283–7. Sorahan T, Cooke MA. Cancer mortality in a cohort of United Kingdom steel foundry workers: 1946-85. Cohort overlapping with Sorahan eta Br J Ind Med. 1989;46(2):74-81. al. 1990 Sorahan T, et al. Cancer risks in a historical UK cohort of benzene exposed workers. Occup Environ Med. Occupational activity not defined or 2005;62(4):231-6. different from those analyzed in the meta-analysis Spinelli JJ, et al. Mortality and cancer incidence in aluminum reduction plant workers. J Occup Med. Cohort overlapping with Spinelli et al. 1991;33(11):1150-5. 2006 Stern et al. Proportionate mortality among unionized roofers and waterproofers. Am J Ind Med. Study from death certificates 2000;37(5):478–92. Stücker I, et al. Cohort mortality study among French asphalt workers. Am J Ind Med. 2003;43(1):58-68. Cohort overlapping with Boffetta et al. 2003 Swaen GM, Slangen JM. Mortality in a German cohort of asphalt workers with potential bitumen Lymphatic and hematopoietic exposure Int Arch Occup Environ Health. 1997;4(Suppl. 1) neoplasms not evaluated Xu Z,et al. Cancer risks among iron and steel workers in Anshan, China, Part I: Proportional mortality Cohort overlapping with Hoshuyama et ratio analysis. Am J Ind Med. 1996;30(1):1-6. al. 2006</p><p>2 3</p>