title: Authorship in the field of femoroacetabular impingement: an analysis of journal publications.
abstract: OBJECTIVE
  This review provides a bibliometric analysis of the contributors to the field of FAI research.
  
  
  METHODS
  A comprehensive search of three databases (MEDLINE, EMBASE, and PubMed) was performed to identify all clinical research articles on the topic of FAI (from inception to 2015). Cadaveric and animal studies were excluded. Study characteristics including authors, residing country of corresponding author, and journal were abstracted from the respective databases.
  
  
  RESULTS
  In total, 1073 articles were included in this review. There were a total of 5471 different authors who contributed to the field of FAI research, 28.3 % of whom were only published in one article. The top 20 authors were associated with over half of all publications, and research studies were typically performed in their countries of residence. The greatest proportion of FAI-related articles was published in the Journal of Arthroscopy and Clinical Orthopaedics and Related Research.
  
  
  CONCLUSIONS
  The number of authors contributing to FAI research is increasing, suggesting not only increasing prevalence of FAI treatment among orthopaedic surgeons but also increasing interest among hip arthroscopists in furthering understanding regarding the diagnosis and management of the condition. The number of publications produced by the top 20 authors (and their affiliated countries: USA, Switzerland, Canada, and the UK) is expected to contribute to a majority of future publications. Current trends suggest that the quality of evidence will continue to improve in the near future, as large-scale, collaborative studies are currently underway.
  
  
  METHODS
  Retrospective study, Level IV.
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Duong
authors.affiliation: Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada.
authors.forename: J
authors.initials: J
authors.lastname: Kay
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Khan
authors.affiliation: Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada.
authors.forename: N
authors.initials: N
authors.lastname: Simunovic
authors.affiliation: McMaster University Medical Center, 1200 Main St W, Room 4E15, Hamilton, ON, L8N 3Z5, Canada. ayenif@mcmaster.ca.
authors.forename: O R
authors.initials: OR
authors.lastname: Ayeni
mesh_terms: D001319:Authorship; D015706:Bibliometrics; D057925:Femoracetabular Impingement; D006801:Humans; D011643:Publishing; D012189:Retrospective Studies
keywords: Authorship; Bibliometric review; Femoroacetabular impingement