Randomized prospective study comparing high-dose-rate intraluminal brachytherapy (HDRILBT) alone with HDRILBT and external beam radiotherapy in the palliation of advanced esophageal cancer - Sur, Ranjan; Donde, Bernard; Falkson, Conrad; Ahmed, Sheikh Nisar; Levin, Victor; Nag, Subir; Wong, Raimond; Jones, Glenn (Brachytherapy, 2004)