@article{HelmerHottenrottRodemersetal.2022,
  author    = {Philipp Helmer and Sebastian Hottenrott and Philipp Rodemers and Robert Leppich and Maja Helwich and R{\"u}diger Pryss and Peter Kranke and Patrick Meybohm and Bernd E. Winkler and Michael Sammeth},
  title     = {Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: Prospective Clinical Trial},
  journal   = {Journal of Medical Internet Research},
  volume    = {24},
  number    = {12},
  doi       = {10.2196/42359},
  year      = {2022},
}