・COVID-19感染拡大時における胆嚢疾患及び胆嚢炎に対する指針
 　　出典：American College of Surgeons, COVID-19 and Surgery “https://www.facs.org/covid-19/newsletter/040720/clinical-guidance“

・GE COVID19 Analytics - 5May2020
 　　出典：American College of Surgeons Communities“https://acscommunities.facs.org/home“

・日本外科学会：COVID-19特設ページ
https://www.jssoc.or.jp/aboutus/coronavirus/index.html

・Sustaining containment of COVID-19: global sharing for pandemic response
 　　出典： Global Health & Medicine “https://www.globalhealthmedicine.com/” published by 国立国際医療研究センター