Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
National Center for Health Statistics,National Survey of Ambulatory Surgery. Public Use Data Fie Documentation,ftp://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/NSAS/NSAS9496.pdf,,National Center for Health Statistics,2005,,,,https://cir.nii.ac.jp/crid/1570572700560276864,