C. Wilbert, “Warm Hands, Warm Heart?” WebMD website, October 23, 2008, https://www.webmd.com/balance/news/20081023/warm-hands-warm-heart.

C. A. Lengacher et al., “Immune Responses to Guided Imagery During Breast Cancer Treatment,” Biological Research for Nursing 9, no. 3 (January 2008): 205–14, doi:10.1177/1099800407309374; C. Maack and P. Nolan, “The Effects of Guided Imagery and Music Therapy on Reported Change in Normal Adults,” Journal of Music Therapy 36, no. 1 (March 1, 1999): 39–55; Y. Y. Tang et al., “Improving Executive Function and Its Neurobiological Mechanisms through a Mindfulness-Based Intervention: Advances within the Field of Developmental Neuroscience,” Child Development Perspectives 6, no. 4 (December 2012): 361–66, doi: 10.1111/j.1750-8606.2012.00250.x.