In the late 20th century and early 21st century, some "health mines" were established in Basin, Montana, which attracted people seeking relief from health problems such as arthritis through limited exposure to radioactive mine water and radon. The practice is controversial because of the well-documented ill effects of high-dose radiation on the body. Pseudoscientific doctors claim beneficial long-term effects, although proper clinical trials have not been performed. The claim of the study is of concern as the authors excluded results from patients requiring cortisone injections as a result of exacerbation of their arthritis during the course of treatment. This study also assumes 60 patients represents all patients. This study also did not record if any patients taken any NSAIDS. The study also claims that the therapeutic benefit comes from the "integration of radon into the skin".