Frequent hypermethylation of RASSF1A and TSLC1, and high viral load of Epstein-Barr Virus DNA in nasopharyngeal carcinoma and matched tumor-adjacent tissues. - Zhou,L.; Jiang,W.; Ren,C.; Yin,Z.; Feng,X.; Liu,W.; Tao,Q.; Yao,K. (Neoplasia, 2005)