Increase in age at onset of rheumatoid arthritis in Japan over a 30 year period
Toru Imanaka, Kanji Shichikawa, Koji Inoue, Yasunori Shimaoka, Yoshitaka Takenaka, Shigeyuki Wakitani
Annals of the Rheumatic Diseases May 1997, 56 (5) 313-316; DOI: 10.1136/ard.56.5.313
