| ATRA | All-trans retinoic acid |
| DAPI | 4′,6-diamidino-2-phenylindole |
| E13.5 | Embryonic day 13.5 |
| HE | Hematoxylin–eosin |
| IHC | Immunohistochemistry |
| ISH | In situ hybridization |
| PAS | Periodic acid–Schiff |
| PBS | Phosphate-buffered saline |
| PBST | Phosphate-buffered saline containing Tween 20 |
| PN0 to PN21 | Postnatal days 0 to 21 |
| RAR | Retinoic acid receptor |
| TAM | Tamoxifen |
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