Isolation and characterization of a thermolabile β-2 macroglycoprotein (‘thermolabile substance’ or ‘Hakata antigen’) detected by precipitating (auto) antibody in sera of patients with systemic lupus erythematosusYoshiaki Yae; Shoichi Inaba; Hiroyuki Sato; Kazuo Okochi; Fuminori Tokunaga; Sadaaki Iwanaga · 1991