1. From the website of the World Health Organization “Child Maltreatment”. https://www.who.int/news-room/fact-sheets/detail/child-maltreatment
2. From the website of the Japan Ministry of Health, Labor and Welfare. “Cases of child abuse cases which were treated at the Child Guidance Center 2020”. (Japanese) https://www.mhlw.go.jp/content/000863297.pdf
3. From the website of the Japan Ministry of Health, Labor and Welfare. “Definition and current status of child abuse”. (Japanese) https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/kodomo/kodomo_kosodate/dv/about.html
4. Keenan HT, Runyan DK, Marshall SW, Nocera MA, Merten DF, Sinal SH (2003) A population-based study of inflicted traumatic brain injury in young children. JAMA 6(290):621–626
5. Narang S, Clarke J (2014) Abusive head trauma: past, present, and future. J Child Neurol 29:1747–1756