Aberrant methylation of p16, DLEC1, BLU and E-cadherin gene promoters in nasopharyngeal carcinoma biopsies from Tunisian patients. - Ayadi W; Karray-Hakim H; Khabir A; Feki L; Charfi S; Boudawara T; Ghorbel A; Daoud J; Frikha M; Busson P; Hammami A (Anticancer research, 2008)