C. de C. Moura, E. de C. L. Chaves, T. C. M. Chianca, S. G. Ruginsk, D. A. Nogueira, and D. H. Iunes, “Effects of auricular acupuncture on chronic pain in people with back musculoskeletal disorders: a randomized clinical trial”, Rev. Esc. Enferm. USP, vol. 53, p. e03418, Mar. 2019, doi: 10.1590/s1980-220x2018009003418.