TY  - RPRT
TI  - Sonic hedgehog is essential to foregut development.
AU  - Y Litingtung
AU  - L Lei
AU  - H Westphal
AU  - C Chiang
PY  - 1998
DO  - 10.1038/1717
UR  - https://pubmed.ncbi.nlm.nih.gov/9731532/
ID  - 9731532
ER  -