Use of 3-D Printed Custom Oral Stents to Improve Positioning and Reproducibility for Patients Treated for Head and Neck Cancer - Liang, R.; Lehnhardt, J.; Chang, C.; Roberts, G.; Gaudilliere, D.; Hara, W.; Le, Q.T.; Beadle, B.M. (International journal of radiation oncology, biology, physics, 2018)