Altogether 123 normal blood samples were collected from random population at the Blood Center of Dalian Red Cross. They all denied psychological ailments and severe systematic diseases, and they had no kinship with each other.

• 随机人群样本为在大连市红十字血液中心随机选取的正常人血液样本123份,无精神疾病和严重躯体疾病,无明确亲缘关系。