Tracheal agenesis versus tracheal atresia: anatomical conditions, pathomechanisms and causes with a possible link to a novel MAPK11 variant in one case oleh Mateja Pfeifer, Helga Rehder, Maria Gerykova Bujalkova, Christine Bartsch, Barbara Fritz, Cordula Knopp, Björn Beckers, Frank Dohle, Matthias Meyer-Wittkopf, Roland Axt-Fliedner, Alexander V. Beribisky, Manuel Hofer, Franco Laccone, Katharina Schoner