title: Letter to the Editor concerning "Comparison of unilateral versus bilateral pedicle screw fixation in lumbar interbody fusion: a meta-analysis" by W. Ding et al. (2014) Eur Spine J 23(2):395-403.
authors.affiliation: Department of Pharmacy, Zhujiang Hospital of Southern Medical University, Guangzhou, 510282, Guangdong, People's Republic of China.|Changning Hospital of Traditional Chinese Medicine, Changning, 421500, Hunan, People's Republic of China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Liao
authors.affiliation: Department of Pharmacy, The Medical College of Hunan Normal University, Changsha, 410013, Hunan, People's Republic of China.
authors.forename: Xing
authors.initials: X
authors.lastname: Feng
authors.affiliation: Department of Pharmacy, Guangdong Women and Children Hospital and Health Institute, Guangzhou, 511400, Guangdong Province, China.
authors.forename: Tieshan
authors.initials: T
authors.lastname: Wang
authors.affiliation: Department of Pharmacy, Guangdong Women and Children Hospital and Health Institute, Guangzhou, 511400, Guangdong Province, China.
authors.forename: Lijing
authors.initials: L
authors.lastname: Chen
authors.affiliation: Department of Pharmacy, Zhujiang Hospital of Southern Medical University, Guangzhou, 510282, Guangdong, People's Republic of China. liaoguoping1020@sina.com.
authors.forename: Jingming
authors.initials: J
authors.lastname: Lin