NCAM1 and thanatophoric dysplasia: Isolated SC-derived populations underwent purity control through FACS analyses resulting in a purity of 93.9 ± 4.3% for CD56+ cells (n = 10; TD and CP patients) and 98.8 ± 0.5% for CD56– cells (n = 4; TD and CP patients) (Supplementary Figure 2A).