title: H-indices of Academic Pediatricians of Mashhad University of Medical Sciences.
abstract: BACKGROUND
  Web of Science, Scopus, and Google Scholar are three major sources which provide h-indices for individual researchers. In this study we aimed to compare the h-indices of the academic pediatricians of Mashhad University of Medical Sciences obtained from the above mentioned sources.
  
  
  METHODS
  Academic pediatrician who had at least 5 ISI indexed articles entered the study. Information required for evaluating the h-indices of the included researchers were retrieved from official websites Web of Science (WOS), Scopus, and Google Scholar (GS). Correlations between obtained h-indices from the mentioned databases were analyzed using Spearrman correlation coefficient. Ranks of each researcher according to each database h-index were also evaluated.
  
  
  RESULTS
  In general, 16 pediatricians entered the study. Computed h-indices for individual authors were different in each database. Correlations between obtained h-indices were: 0.439 (ISI and Scopus), 0.488 (ISI and GS), and 0.810 (Scopus and GS). Despite differences between evaluated h-indices in each database for individual authors, the rankings according to these h-indices were almost similar.
  
  
  CONCLUSIONS
  Although h-indices supplied by WOS, SCOPUS, and GS can be used interchangeably, their differences should be acknowledged. Setting up "ReasercherID" in WOS and "User profile" in GS, and giving regular feedback to SCOPUS can increase the validity of the calculated h-indices.
authors.affiliation: Pediatric Gastroenterology Ward, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Kianifar
authors.initials: K
authors.lastname: Hamidreza
authors.affiliation: Pediatric Neurology Ward, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Akhoondian
authors.initials: A
authors.lastname: Javad
authors.affiliation: Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Sadeghi
authors.initials: S
authors.lastname: Ramin
authors.affiliation: Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Zarifmahmoudi
authors.initials: Z
authors.lastname: Leili
keywords: Google Scholar; H-index.; ISI; Mashhad; Pediatric; SCOPUS; Web of Science