Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
B. Starfield,Comorbidity and the Use of Primary Care and Specialist Care in the Elderly,The Annals of Family Medicine,1544-1709,Annals of Family Medicine,2005-05-01,3,3,215-222,https://cir.nii.ac.jp/crid/1362262944419768064,https://doi.org/10.1370/afm.307