title: A historical review of classic articles in surgery field.
abstract: BACKGROUND
  Surgery is one of the most rapidly developing specialties in the past century. Diagnostic methods, operation technique, and knowledge of the diseases are changing continuously. In the academic history, lots of classic papers brought advances for surgery. They were accepted and cited numerously by the medical specialists all over the world. Citation analysis reflects the recognition a work has received in the scientific community by its peers.
  
  
  METHODS
  The articles in the field of surgery have been cited at least 1,000 times since its publication to 2011 were analyzed. By categorizing the publication year, journals, authors, institutions, countries, life citation cycles, level of evidence provided, and characteristics of the topmost articles, we intended to determine what qualities make the articles important to the specialty. The methodology used in this study was based on the Science Citation Index Expanded database of Web of Science from Thomson Reuters. According to Journal Citation Reports of 2011, it indexes 8,336 journals with citation references across 176Web of Science categories in science edition. Level of evidence of these articles was graded according to the standard provided by Oxford Centre for Evidence-Based Medicine.
  
  
  CONCLUSIONS
  Totally 36 articles have been cited at least 1,000 times since their publication to the year 2011. According to their citation histories, 35 articles were further evaluated. These topmost articles covered 8 subspecialties of surgery and were published in 17 journals. The publication year varied from 1940 to 1999 and the articles provided different level of evidence, most of which are retrospective studies of case series. Six articles were research articles including animal model, histology analysis, and laboratory research. The others were clinical articles. From the results of citation analysis, the classic articles are not always in top citations. In addition, some of these articles have no citations after several years post their publication. The introduction of a commonly used classification or scoring system is a major factor in propelling citation by other authors. The most cited articles in surgery present their long academic life in spite of their level of evidence and journal impact factor in which they were published.
authors.affiliation: Division of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Beijing, People's Republic of China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Long
authors.affiliation: Division of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Beijing, People's Republic of China.
authors.forename: Jiu-Zuo
authors.initials: JZ
authors.lastname: Huang
authors.affiliation: Trend Research Centre, Asia University, No. 500, Lioufeng Road, Wufeng, Taichung County 41354, Taiwan. Electronic address: ysho@asia.edu.tw.
authors.forename: Yuh-Shan
authors.initials: YS
authors.lastname: Ho
mesh_terms: D000818:Animals; D015706:Bibliometrics; D016206:Databases, Bibliographic; D019317:Evidence-Based Medicine / Q000266:history; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D055811:Journal Impact Factor / Q000266:history*; D013043:Specialties, Surgical / Q000266:history* / Q000706:statistics & numerical data
keywords: Article life; Bibliometric; Surgery; Top cited articles; Web of science