Influence of anxiety on the heart rate variability of patients in preoperative orthopedic surgery. Research, Society and Development, [S. l.], v. 10, n. 8, p. e14410817237, 2021. DOI: 10.33448/rsd-v10i8.17237. Disponível em: https://rsdjournal.org/rsd/article/view/17237. Acesso em: 5 dec. 2025.