According to the severity of the disease,<unk><unk>  may be classified into mild, moderate, and severe form of<unk> .
Psoriatic arthritis classification
Septic arthritis classification
Rheumatic fever classification
Ankylosing spondylitis classification
Bursitis classification
Sjögren's syndrome classification
Osteoarthritis classification
Systemic lupus erythematosus classification scheme