The molecular genetic background leading to the formation of the human erythroid-specific Xga/CD99 blood groups di Chih-Chun Yeh, Ching-Jin Chang, Yuh-Ching Twu, Chen-Chung Chu, Bi-Shan Liu, Ji-Ting Huang, Shu-Ting Hung, Yung-Syu Chan, Yi-Jui Tsai, Sheng-Wei Lin, Marie Lin, Lung-Chih Yu