Likely foregut endoderm origin for a postzygotic mutation affecting the RNase IIIb domain of DICER1. Issue 7 (20th September 2021) - Chong, Anne-Sophie; Apellaniz-Ruiz, Maria; de Kock, Leanne; Bouron-Dal Soglio, Dorothée; Doyle, William R; Priest, John R; Rivera, Barbara; Foulkes, William D