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Special Reviews: 354th Triannual Meeting of the Juntendo Medical Society “Recent topics in Psychiatry” [1]The Current Progress of Psychiatric Genomics .......................................................Masaki Nishioka ...........2Prevention of Delirium Via Melatonin and Orexin Neurotransmission .............................Kotaro Hatta ..........12Bipolar Disorder: From Pathophysiology to Treatment ..............................................Tadafumi Kato ..........17Mental Health of Healthcare Workers During the COVID-19 Pandemic ...................Narimasa Katsuta ..........25Health Topics for Tokyoites: 46th Health Topics for Tokyoites “To survive the 100-year life -Aiming for health and longevity-” [1]Osteoporosis and Osteoporotic Vertebral Fractures: Breaking the Chain of Osteoporotic Fractures to Increase Healthy Life Expectancy ......................................................................Rei Momomura ..........31Original ArticlesThe Impact of Travel Distance to Delayed Presentation and Follow-up Attendance of Retinal Detachment Cases in Surabaya, Indonesia .......................................Sauli Ari Widjaja, et al. ..........36ReviewsA Contribution to the History of Japanese Education Systems for Radiological Technologists ............................................................................................................Yasuaki Sakano, et al. ..........44Mini ReviewsLatest Clinical Evidence and Operative Strategy for Small-Sized Lung Cancers ................................................................................................Aritoshi Hattori, Kenji Suzuki ..........52Publication ListPublications from Juntendo University Graduate School of Medicine, 2019 ［5/6］ ............................................60Instructions to Authors ..........................................................................................................................78From the illustrator: The coronavirus infection continues to spread, and now we cannot possibly hope to enjoy traveling abroad. One day, my friend who used to love overseas trip brought me dolls made in Peru she had visited several years ago. I immediately decided to use them as a motif in my painting class. The Peruvian dolls have exotic features, being dressed in their traditional costume.Vol. 68 No. 1 （936th issue）February 2022The Juntendo Medical SocietyContents