Directions of odds ratios might be inappropriate in the paper by Tafarel et al.

aLiver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Shenyang Military Area, Shenyang bMedical Department, 309th Hospital of Chinese People’s Liberation Army, Beijing cDepartment of Health Statistics, Fourth Military Medical University, Xi’an, China Correspondence to Xiaozhong Guo, MD, Department of Gastroenterology, General Hospital of Shenyang Military Area, No. 83 Wenhua Road, Shenyang 110840, China Tel: +86 24 28897603; fax: +86 24 28851113; e-mail: [email protected] Received January 7, 2015 Accepted January 8, 2015