Characteristic of disease ▲ Atuoimmune Target tissue damage: connection tissue(shin、 Joint、 muscles) A Predominantly population: women during their reproductive year 90% A morbidity 70 per 100, 000二. Characteristic of disease: ▲ Atuoimmune ▲ Target tissue damage: connection tissue (shin、Joint、 muscles) ▲ Predominantly population： women during their reproductive year 90% ▲ morbidity：70 per 100，000