The dorsal part of the common foregut and the normal esophagus were negative for PAS. FGF7, 10 were expressed on the places where the PAS staining were positive.
PAS染色及FGF7、10免疫组化染色可见前肠背侧半及食管为阴性， 前肠腹侧半及气管部分为阳性；
The dorsal part of the common foregut and the normal esophagus were negative for PAS. FGF7, 10 were expressed on the places where the PAS staining were positive.
PAS染色及FGF7、10免疫组化染色可见前肠背侧半及食管为阴性， 前肠腹侧半及气管部分为阳性；
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