Oral sex and risk of oral cancer: a meta-analysis of observational studies

Association between oral sex and oral cancer is a highlighted topic all the time; however, many published epidemiological studies remain failed to obtain a consistent conclusion. We performed this meta-analysis to ascertain whether oral sex is a risk factor or a risk marker for oral cancer.The PubMed database was searched up to 30 August 2013 (latest updated on 21 December 2014) for relevant observational studies that tested the association...