Biofeedback Enabled CALM (BeCALM)-the feasibility of biofeedback on procedural anxiety during radiation therapy: study protocol for a pilot randomised controlled trial.
BMJ Open. 2022 Dec 7;12(12):e062467. doi: 10.1136/bmjopen-2022-062467. BMJ Open. 2022. PMID: 36600369 Free PMC article.