We have provided more information on the construction of the Art Scale. 2) We have elaborated on ideas for future research, specifically calling for interventional research to test whether empathy in medical students (as well as the foundational concepts we've identified of curiosity, connection, nuance, and complexity) can be improved through exposure to art, as well as investigation of potentially relevant variables such as background of instructor, method of instruction, type of art, and variations of setting. 3) We corrected an error in the last name of the third author.