Letter to the editor of radiotherapy and oncology regarding the paper titled "Impact on xerostomia for nasopharyngeal carcinoma patients treated with superficial parotid lobe-sparing intensity-modulated radiation therapy (SPLS-IMRT): A prospective phase II randomized controlled study." by Huang et al. (December 2022) - Sarode, Gargi S.; Sarode, Sachin C.; Anand, Rahul