Flow chart of study selection by using electronic database and other sources. Jun Zhang Zhiwei Xv Xuefeng Wu Ke Li 10.1371/journal.pone.0052896.g001 https://plos.figshare.com/articles/figure/_Flow_chart_of_study_selection_by_using_electronic_database_and_other_sources_/185827 <p>Flow chart of study selection by using electronic database and other sources.</p> 2012-12-28 01:37:07 oncology pathology Gastroenterology and hepatology