The two-locus, non-parametric linkage analysis (NPL), maximum LOD score and transmission/disequilibrium test (TDT) with GENEHUNTER program were used in this study.

• 统计采用GENEHUNTER软件包两点非参数连锁（NPL）分析、计算优势对数记分(Lod)值及传递不平衡检验（TDT）。