The Journal of Economic Literature codes classification system (JEL) published by the American Association (AEA) is de facto standard for research literature in economics. JEL used to classify articles, dissertations, books, book reviews, and working papers EconLit, a database maintained AEA. Over time, it has evolved extended with over 850 subclasses. This paper reviews history development sys...

Abstract Background Chemoradiotherapy (CRT) is a core component of curative treatment for esophageal cancer locally advanced cancer. Salvage esophagectomy undertaken in patients who experience recurrent or residual post-CRT. This study aims determine the impact delayed surgical intervention following chemoradiotherapy on survival from oesophageal Methods was an international, multi-center, retr...