Commentary on "Common Genetic Polymorphisms Modify the Effect of Smoking on Absolute Risk of Bladder Cancer." Garcia-Closas M, Rothman N, Figueroa JD, Prokunina-Olsson L, Han SS, Baris D, Jacobs EJ, Malats N, De Vivo I, Albanes D, Purdue MP, Sharma S, Fu YP, Kogevinas M, Wang Z, Tang W, Tardón A, Serra C, Carrato A, Garcia -Closas R, Lloreta J, Johnson A, Schwenn M, Karagas MR