_:vb50946425 "A T cell deficiency characterized by childhood onset of recurrent and recalcitrant skin warts due to uncontrolled viral infection with human papillomavirus and absence of the CD4 antigen on T cells, monocytes, and dendritic cells that has_material_basis_in homozygous or compound heterozygous mutation in CD4 on chromosome 12p13."^^ . _:vb50946425 "url:https://pubmed.ncbi.nlm.nih.gov/31781092/"^^ . _:vb50946425 . _:vb50946425 "url:https://pubmed.ncbi.nlm.nih.gov/33471124/"^^ . _:vb50946425 . _:vb50946425 . _:vb50946425 . _:vb50946425 .