Wang Lifen, Pei Qingshan, Shi Yongjun
Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, PR China.
Gastroenterology. 2018 Jun;154(8):2041-2042. doi: 10.1053/j.gastro.2017.09.044. Epub 2017 Oct 6.