From the 1Department of Psychiatry, Chiba University Graduate School of Medicine

2Division of Medical Treatment and Rehabilitation, Center for Forensic Mental Health, Chiba University

3Chiba Psychiatric Medical Center, Chiba

4Department of Social Medicine, Toho University School of Medicine, Tokyo, Japan.

Received December 29, 2021; accepted after revision March 26, 2022.

Address correspondence to: Nobuhisa Kanahara, MD, PhD, Division of Medical Treatment and Rehabilitation, Center for Forensic Mental Health, Chiba University, 1-8-1 Inohana, Chuou-ku, Chiba-shi, Chiba 260-8670, Japan (e-mail: [email protected]).