Please polish the following text using the tone and the style of the Star Methods of a Cell paper. Please keep all the information and add more if necessary: 'We collected gastrointestinal tracts from Sox10-iCreERT2; Rosa26-EGFPf mice 24 hours after tamoxifen administration. We dissected each gastrointestinal tract into three regions: the stomach, the small intestine (not exist at E10.5) and the colon (not exist at E10.5 and E12.5). For each region, we pooled tissue sections from six embryos at E10.5, E12.5 and E14.5, or from three embryos or animals at E17.5 and P21, to obtain sufficient numbers of GFP-positive cells. Pooled samples were then digested with Dispase/Collagenase (1 mg/ml, D4693, Sigma-Aldrich) at 37°C for 15-30 minutes. The cell suspension was filtered with 40μm nylon cell strainers (CSS013040, Biofil) and GFP-positive cells were sorted by fluorescence-activated cell sorting (FACS) using a Moflo XDP (NAME_1). We also collected GFP-negative cells as a reference for the non-neural cells in the gastrointestinal tract. We performed single-cell RNA sequencing (scRNA-seq) using the 10x Genomics platform on a mixture of GFP-positive and negative cells, with a ratio of 1:3.'