10.6084/m9.figshare.c.3855640_D1.v1 Yi Tang Yi Tang Xu Tang Xu Tang Qinghua Wei Qinghua Wei Hui Zhang Hui Zhang Additional file 1: of Intrathecal morphine versus femoral nerve block for pain control after total knee arthroplasty: a meta-analysis Springer Nature 2017 Intrathecal morphine Total knee arthroplasty Femoral nerve block Meta-analysis 2017-08-16 05:00:00 Journal contribution https://springernature.figshare.com/articles/journal_contribution/Additional_file_1_of_Intrathecal_morphine_versus_femoral_nerve_block_for_pain_control_after_total_knee_arthroplasty_a_meta-analysis/5318686 Subgroup analysis results of VAS score. (DOCX 6040 kb)