@article{Koike2018, author = "Soichi Koike and Masatoshi Matsumoto and Hideaki Kawaguchi and Hiroo Ide and Hidenao Atarashi and Kazuhiko Kotani and Hideo Yasunaga", title = "{Additional file 2: of Board certification and urban–rural migration of physicians in Japan}", year = "2018", month = "8", url = "https://springernature.figshare.com/articles/journal_contribution/Additional_file_2_of_Board_certification_and_urban_rural_migration_of_physicians_in_Japan/6944687", doi = "10.6084/m9.figshare.6944687.v1" }