Poon DMC, Kam MKM, Johnson D, Mo F, et al. Durability of the parotid-sparing effect of intensity-modulated radiotherapy (IMRT) in early stage nasopharyngeal carcinoma: A 15-year follow-up of a randomized prospective study of IMRT versus two-dimensional radiotherapy. Head Neck 2021 Feb 11. doi: 10.1002/hed.26634.
PMID: 33576030