{Reference Type}: Journal Article {Title}: Assessing the Causal Relationship between Waterpipe Smoking and Bladder Cancer. {Author}: Rosser CJ; {Journal}: Cancer Epidemiol Biomarkers Prev {Volume}: 33 {Issue}: 4 {Year}: 2024 Apr 3 {Factor}: 4.09 {DOI}: 10.1158/1055-9965.EPI-24-0051 {Abstract}: Rates of waterpipe use increase with very little data reporting any potential health consequences. The current study, a large case-control study, of 4,194 patients from Iran denotes an elevated risk of bladder cancer in exclusive waterpipe smokers compared with non-users. Additional studies are needed to further understand the risk waterpipe smoking has on bladder cancer. See related article by Hadji et al., p. 509.