Objective To evaluate the histological characteristics of xenogeneic graft-versus-host disease(GVHD),and to differentiate it from the allogeneic GVHD.

目了解异移植物抗宿主病(GVHD)组织学特点，与同GVHD异脾脏移植关系。

Objective:To explore the possibility of cultivation of microencapsulated human hair dermal papilla cells in vitro and xenogeneic model.

探讨微囊化人头皮毛乳头细胞体外培养异体移植可行性。