Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) John N. Mafi and Melody Craff and Sitaram Vangala and Thomas Pu and Dale Skinner and Cyrus Tabatabai-Yazdi and Anikia Nelson and Rachel Reid and Denis Agniel and Chi-Hong Tseng and Catherine Sarkisian and Cheryl L. Damberg and Katherine L. Kahn,"Trends in US Ambulatory Care Patterns During the COVID-19 Pandemic, 2019-2021",JAMA,0098-7484,American Medical Association (AMA),2022-01-18,327,3,237,https://cir.nii.ac.jp/crid/1360022497431443712,https://doi.org/10.1001/jama.2021.24294