Methods HLA?DQA?1 and DQB?1 gene polymorphism was tested in 30 CLT patients and 24 normal controls of Chinese Han nationality by using DNA amplification with polymerase chain reaction of sequence?specific primers (PCR?SSP).

• 方法用序列特异性引物的聚合酶链反应（PCR?SSP）方法，分析30例由病理证实的我国汉族CLT患者及24名正常对照的外周血白细胞基因组DNA的HLA?DQA1及DQB1位点的基因多态性分布。