For RNAseq analysis, samples were taken from at least 3 separate experiments that passed our quality control metrics. Our quality control metrics included: 1) a minimum percentage (70%) of FOXG1 and NKX2-1 positive cells by immunofluorescence at D24; 2) a minimum percentage (10%) of Citrine+ cells by FACs analysis at D24; 3) a minimum (30%) percentage of SST+ cells by immunofluorescence at D54.