2004, Study on biological effects of radon and thermal therapy on osteoarthritis

Yamaoka K, Mitsunobu F, Hanamoto K, Mori S, Tanizaki Y, Sugita K:

J.Pain . 2004; 5: 20-25. doi: 10.1016/j.pain.2003.09.005

https://pubmed.ncbi.nlm.nih.gov/14975375/