We would like to inform you that ProQuest will be undergoing maintenance. 
During this maintenance, Proquest databases and Ebook Central books will be temporarily unavailable during the following times:

■Period
　ProQuest Health & Medical Collection　11:00-19:00 on Sunday, 10 August 2025 (JST)
　ProQuest Ebook Central　　　　　　　 11:00-15:00 on Sunday, 10 August 2025 (JST)
We apologize for any inconvenience this may cause.