Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SHELLY MA,Comparison of pneumococcal polysaccharide and CRM197-conjugated pneumococcal oligosaccharide vaccines in young and elderly adults,Infect. Immun.,,,1997,65,,242-247,https://cir.nii.ac.jp/crid/1570572700920504192,