Online search interest in major depressive disorder: Infodemiology study using the most visited search engine in Japan - Rikako Shimizu; Kosuke Ishizuka; Kagami Kobayakawa; Taiju Miyagami; Mizue Saita; Hirotake Uchikado; Tomoki Yamada; Tomoya Sakama; Akihiko Kusakabe; Mitsuyasu Ohta; Toshio Naito (PLoS ONE, 2026)