Ohkubo, M. ., Ueda, T. ., Sugito, H. ., Watanabe, A. ., Seshima, F. ., Morioka, T. ., & Yajima, Y. . Two-year Survey of Trends at Food Introduction Booth at Suidobashi Hospital of Tokyo Dental College. The Bulletin of Tokyo Dental College, 59(3), 213-221. https://doi.org/10.2209/tdcpublication.2017-0047 (Original work published 2018)