Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SCARAMUZZINO DA,Five-year stability study of free and total prostate-specific antigen concentrations in serum specimens collected and stored at-70 degrees C or less,Int. J. Biol. Markers,,,2007,22,,206-213,https://cir.nii.ac.jp/crid/1570291226319454464,