流行病学资料(2 发病有一定的家庭集聚现象 兄弟姐妹、双胎发病率相对较高 提示:有遗传倾向与致病或环境因素相互作用 Higher rates of Kd in the siblings and twins suggest a possible role for genetic predisposition that interacts with exposure to the etiologic agent or agents in the environments流行病学资料(2) 发病有一定的家庭集聚现象 兄弟姐妹、双胎发病率相对较高 提示：有遗传倾向与致病或环境因素相互作用 Higher rates of KD in the siblings and twins suggest a possible role for genetic predisposition that interacts with exposure to the etiologic agent or agents in the environments