Top 100 Cited Articles on Hematopoietic Stem Cell Transplantation: A Bibliometric Analysis
Authors: Shahzad Moazzam , Arslan Muhammad , Naseem Zehra , Abbas Sakina , Fatima Naira , Hussain Ali , Ali Tayyaba , Anwar Iqra , Siddiqui Raheel S , Chaudhary Sibgha Gull , Ahmed Nausheen , Abhyankar Sunil , Hematti Peiman , McGuirk Joseph P. , Mushtaq Muhammad Umair 
Published: November 2021

Abstract
Background: Research performance is evaluated by bibliometric analysis of citations, and this can help to identify the most impactful articles in the field of hematopoietic stem cell transplantation (HSCT). We conducted a bibliometric analysis to identify scholarly impact and factors associated with the top 100 cited articles on HSCT.
Methods: Thomas Reuters Web of Science core collection (WoS) was accessed in January 2021 and a title-specific search was conducted using the keywords "hematopoietic stem-cell transplantation ", "transplantation, hematopoietic stem cell," "stem cell transplantation, hematopoietic," "bone-marrow transplantation," "transplantation, bone marrow," "grafting, bone marrow," "transplantation bone marrow cell," "bone marrow cell transplantation," "stem cell transplant," "allogeneic hematopoietic stem cell transplant," "autologous hematopoietic stem cell transplant". Non-Human and non-HSCT studies were excluded. A total of 39,406 records were identified and a list of the top 100 articles was made. Articles included in our study were characterized by the number of citations, year of publication, topic, study design, authors, h-index, and institutions. Data were analyzed using SPSS in April 2021. Bivariate analyses, using chi-square and t-test, and linear regression analyses were performed.
Results: The 100 most cited articles in the field were published over 52 years from 1968 to 2020, with a maximum number of articles (n=40) published in the 1990s decade. Top-100 articles were cited 62,002 times with a median citation count of 465 (range 336-2240). The top-cited articles originated from 12 countries and the United States (US) contributed 69 articles. The University of Washington Fred Hutchinson Cancer Center (n=15) was the leading institution. Blood (n=32) and New England Journal of Medicine (n=31) made the greatest contribution, and 41 manuscripts were clinical trials. In a multivariate regression model, the first author's h-index (regression coefficient 5.46, 95% confidence interval 2.99-7.93, p&lt;0.001) correlated with the citation count while gender, journal impact factor, years since publication, and the number of authors did not have a significant association.
Conclusion: Our study highlights the most influential articles on clinical HSCT, centralization of research to North American and European institutions, and provides valuable insight for future research needs of the specialty.
Figure 1 Figure 1.

Disclosures
Abhyankar: Incyte/Therakos: Consultancy, Research Funding, Speakers Bureau. McGuirk: Novartis: Research Funding; Pluristem Therapeutics: Research Funding; Juno Therapeutics: Consultancy, Honoraria, Research Funding; Astelllas Pharma: Research Funding; Magenta Therapeutics: Consultancy, Honoraria, Research Funding; Allovir: Consultancy, Honoraria, Research Funding; Gamida Cell: Research Funding; EcoR1 Capital: Consultancy; Bellicum Pharmaceuticals: Research Funding; Novartis: Research Funding; Fresenius Biotech: Research Funding; Kite/ Gilead: Consultancy, Honoraria, Other: travel accommodations, expense, Kite a Gilead company, Research Funding, Speakers Bureau.