Tian, X., Chen, W., Huang, J., He, L., Liu, B., Liu, X., . . . Liu, B. (2017). Effects of polyethylene glycol 2 L alone or with ascorbic acid compared with polyethylene glycol 4 L alone for bowel preparation before colonoscopy: Protocol for a systematic review and network meta-analysis. BMJ Open.

Tian, Xu, Wei-Qing Chen, Jie-Li Huang, Lan-Ying He, Bang-Lun Liu, Xi Liu, Hang Zhou, a Bing-Rong Liu. "Effects of Polyethylene Glycol 2 L Alone or With Ascorbic Acid Compared With Polyethylene Glycol 4 L Alone for Bowel Preparation Before Colonoscopy: Protocol for a Systematic Review and Network Meta-analysis." BMJ Open 2017.

Tian, Xu, et al. "Effects of Polyethylene Glycol 2 L Alone or With Ascorbic Acid Compared With Polyethylene Glycol 4 L Alone for Bowel Preparation Before Colonoscopy: Protocol for a Systematic Review and Network Meta-analysis." BMJ Open 2017.