title: A bibliometric analysis on tobacco regulation investigators.
abstract: BACKGROUND
  To facilitate the implementation of the Family Smoking Prevention and Tobacco Control Act of 2009, the Federal Drug Agency (FDA) Center for Tobacco Products (CTP) has identified research priorities under the umbrella of tobacco regulatory science (TRS). As a newly integrated field, the current boundaries and landscape of TRS research are in need of definition. In this work, we conducted a bibliometric study of TRS research by applying author topic modeling (ATM) on MEDLINE citations published by currently-funded TRS principle investigators (PIs).
  
  
  RESULTS
  We compared topics generated with ATM on dataset collected with TRS PIs and topics generated with ATM on dataset collected with a TRS keyword list. It is found that all those topics show a good alignment with FDA's funding protocols. More interestingly, we can see clear interactive relationships among PIs and between PIs and topics. Based on those interactions, we can discover how diverse each PI is, how productive they are, which topics are more popular and what main components each topic involves. Temporal trend analysis of key words shows the significant evaluation in four prime TRS areas.
  
  
  CONCLUSIONS
  The results show that ATM can efficiently group articles into discriminative categories without any supervision. This indicates that we may incorporate ATM into author identification systems to infer the identity of an author of articles using topics generated by the model. It can also be useful to grantees and funding administrators in suggesting potential collaborators or identifying those that share common research interests for data harmonization or other purposes. The incorporation of temporal analysis can be employed to assess the change over time in TRS as new projects are funded and the extent to which new research reflects the funding priorities of the FDA.
authors.affiliation: Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN USA.
authors.forename: Dingcheng
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Hemotology/Oncology Mayo Clinic, Scottsdale, AZ Arizona.
authors.forename: Janet
authors.initials: J
authors.lastname: Okamoto
authors.affiliation: Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN USA.
authors.forename: Hongfang
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Hemotology/Oncology Mayo Clinic, Scottsdale, AZ Arizona.
authors.forename: Scott
authors.initials: S
authors.lastname: Leischow
keywords: Author topic modeling; Bibliometric analysis; FDA; Principle investigators; Tobacco regulation science