Effect of left & right nostril breathing on R-R interval among adult males A cross-sectional study. International Journal of Biomedical Research, [S. l.], v. 6, n. 2, p. 87–91, 2015. DOI: 10.7439/ijbr.v6i2.1628. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/1628. Acesso em: 2 apr. 2026.