| evidence of human papilloma virus infection and its epidemiology in esophageal squamous cell carcinoma. | to look for the evidence of human papilloma virus (hpv) infection in esophageal squamous cell carcinomas (escc) and to investigate the potential role and epidemiology of hpv infection in the pathogenesis of esophageal carcinomas in henan emigrants. | 2006 | 16552800 |