Multi-organ segmentation of the head and neck area: an efficient hierarchical neural networks approach. - Elias Tappeiner; Samuel Pröll; Markus Hönig; Patrik F. Raudaschl; Paolo Zaffino; Maria Francesca Spadea; Gregory C. Sharp; Rainer Schubert; Karl D. Fritscher (Int. J. Comput. Assist. Radiol. Surg., 2019)