Looking for Ozone Therapy Health Practitioners in New Zealand

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My mum has been diagnosed with Osteoarthritis and now I need help with looking for some Ozone Therapy Practitioners in New Zealand,if anyone can help,regarding the area I live in is Wellington quite close to the South Island,I am also obese as well and would like to use Ozone Therapy to treat my obesity and if any New Zealand members can help on if there are any practitioners who use Ozone Therapy in the North or South Island,it will be appreciated