Before inducing any therapy, it is wise to collect as much information as possible! Check out the following links:
Introductory articles for ozone.
Protocols for using Ozone Therapy
Ozone in Medicine: Overview and Future Directions
The Story of Ozone
Ozone Sauna Buyer's Guide - A collection of articles about ozone and its uses in medicine and other fields. Many of the articles are by professionals in the field and contain references for further reading.