Chhetri P, Shrestha L, MahotraNB. Validity of Elite-HRV Smartphone Application for Measuring Heart Rate Variability Compared to Polar V800 Heart Rate Monitor. J Nepal Health Res Counc [Internet]. 2022Mar.13 [cited 2024Apr.26];19(04):809-13. Available from: http://jnhrc.com.np/index.php/jnhrc/article/view/3949