id	domain	url
brainmatters-999	positivepsychology.com	https://positivepsychology.com/neuroscience-ofgratitude/#:~:text=when%20we%20express%20gratitude%2
brainmatters-999	www.simplypsychology.org	https://www.simplypsychology.org/brainreward-system.html
brainmatters-999	www.simplypsychology.org	https://www.simplypsychology.org/serotonin-vsdopamine.html
brainmatters-999	www.sciencedirect.com	https://www.sciencedirect.com/science/article/pii/s088915912
brainmatters-999	www.waldenu.edu	https://www.waldenu.edu/onlinebachelors-programs/bs-in-psychology/resource/how-positiveself-talk-can-make-you-feel-better-and-be-more-productive
brainmatters-999	www.nature.com	https://www.nature.com/articles/s41598-021-94328-9
brainmatters-999	doi.org	https://doi.org/10.1038/s41598-01705520-9
brainmatters-999	newsroom.ucla.edu	https://newsroom.ucla.edu/stories/gratitude-249167
brainmatters-999	www.forbes.com	https://www.forbes.com/sites/forbescoachescouncil/2021/05