Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Masao Hiraga and Ryota Hara and Tamami Yoshitama and Yasuhito Tanaka and Akito Sato and Kei Ikeda and Koichiro Shigeta,Sonographic measurements of low-echoic synovial area in the dorsal aspect of metatarsophalangeal joints in healthy subjects,Modern Rheumatology,1439-7595,Oxford University Press (OUP),2014-11-10,25,,386-392,https://cir.nii.ac.jp/crid/1870865117532791424,https://doi.org/10.3109/14397595.2014.970740