IDS and mucopolysaccharidosis type 2: Varga and co-workers published the successful obtainment of four different iPSC lines starting from peripheral blood mononuclear cells (PBMCs) of three Hunter male patients (1, 3, and 7 years old) and one MPS II unaffected female carrier [210,211,212,213], while Hong generated iPSCs starting from fibroblasts of a 3-year-old patient with a frameshift mutation in the IDS gene [214].