“Clinical Case: Use of Rectal Ozone Therapy and Ozonized Saline Solution in Patient With Covid-19 Pneumonia”. Ozone Therapy Global Journal 11, no. 1 (June 1, 2021): 53–68. Accessed June 23, 2026. https://journal.ozonetherapyglobaljournal.es/index.php/otgj/article/view/56.