Fig. 1From: Risk factors for pain after total hip arthroplasty: a systematic reviewFlow diagram of a systematic review of articles published from January 1995 to May 2018 about adults undergoing total hip arthroplasty. The databases searched were PubMed (Medline), Scopus, Web of Science, Cumulative Index of Nursing and Allied Health Literature Plus (EBSCO), Embase, and CochraneBack to article page