Efficacy of virtual reality assisted guided imagery (VRAGI) in a home setting for pain management in patients with advanced cancer: protocol for a randomised controlled trial oleh Andrew Todd, Rosalba Hernandez, George Hartshorn, Matthew Browning, Kapil Chalil Madathil, Fredric Mau, Shyam Ranganathan, Jeff Bertrand, Allison Maynard, Olivia McAnirlin, Kailan Sindelar, Teny Henry Gomez