Esophageal cancer in high-risk areas of China: research progress and challenges  Yingsong Lin, MD, PhD, Yukari Totsuka, PhD, Baoen Shan, MD, PhD, Chaochen Wang, PhD, Wenqiang Wei, MD, PhD, Youlin Qiao, MD, PhD, Shogo Kikuchi, MD, PhD, Manami Inoue, MD, PhD, Hideo Tanaka, MD, PhD, Yutong He, MD, PhD  Annals of Epidemiology  Volume 27, Issue 3, Pages 215-221 (March 2017) DOI: 10.1016/j.annepidem.2016.11.004 Copyright © 2016 Elsevier Inc. Terms and Conditions

Fig. 1 Geographical locations of the four high-risk areas in China. Annals of Epidemiology 2017 27, 215-221DOI: (10.1016/j.annepidem.2016.11.004) Copyright © 2016 Elsevier Inc. Terms and Conditions