The following is a list of the references and citations with clickable links to save you time:

  1. Buteyko, K. P. (n.d.). Practical elements. Retrieved from
  2. Kim, H. G., Cheon, E. J., Bai, D. S., Lee, Y. H., & Koo, B. H. (2018). Stress and Heart Rate Variability: A Meta-Analysis and Review of the Literature. Psychiatry investigation, 15(3), 235─245. PMID: 29486547 – DOI: 10.30773/PI.2017.08.17
  3. Smith, N. L., Wilson, A. L., Gandhi, J., Vatsia, S., & Khan, S. A. (2017). Ozone therapy: an overview of pharmacodynamics, current research, and clinical utility. Medical gas research, 7(3), 212-219. PMID: 29152215 – DOI: 10.4103/2045-9912.215752
  4. Poff, A. M., Ari, C., Seyfried, T. N., & D’Agostino, D. P. (2013). The ketogenic diet and hyperbaric oxygen therapy prolong survival in mice with systemic metastatic cancer. PloS one,8(6), e65522. PMID: 23755243 – DOI: 10.1371/JOURNAL.PONE.0065522

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