Endoscopy demand among county people in southeast China: A cross-sectional study oleh Huihui Yan, Zhenghua Lin, Shuangjing Gao, Chenyu Fan, Mengyue Jiang, Liying Que, Lanfang Zhou, Yingdi Weng, Jing Shu, Tongyun Zhang, Jian Hu, Zhiqiang Liu, Xi Ye, Jianting Cai, Guangfa Liao