There are a few others, some of them by in-house science team https://iopscience.iop.org/article/10.1088/1361-6579/ab840a https://iopscience.iop.org/article/10

There are a few others, some of them by in-house science team https://iopscience.iop.org/article/10.1088/1361-6579/ab840a https://iopscience.iop.org/article/10.1088/1361-6579/ab840a https://www.researchgate.net/publication/335764849_Following_the_heart_what_does_variation_of_resting_heart_rate_tell_about_us_as_individuals_and_as_a_population https://www.researchgate.net/publication/335764849_Following...