10.1371/journal.pone.0098856.g001 Jennifer A. Hirst Jennifer A. Hirst Jeremy Howick Jeremy Howick Jeffrey K. Aronson Jeffrey K. Aronson Nia Roberts Nia Roberts Rafael Perera Rafael Perera Constantinos Koshiaris Constantinos Koshiaris Carl Heneghan Carl Heneghan Flowchart of identified and included studies. Public Library of Science 2014 mathematics Statistics (mathematics) Statistical methods bioethics Clinical medicine clinical trials epidemiology Research assessment Research reporting guidelines Systematic reviews Animal studies Animal models of disease Model organisms Animal models research design Clinical research design Preclinical models included 2014-06-06 03:12:00 Figure https://plos.figshare.com/articles/figure/_Flowchart_of_identified_and_included_studies_/1049457 <p>Flowchart of identified and included studies.</p>