2005, Radon therapy fort he treatment of rheumatic diseases – review and meta analysis of controlled clinical trials

FalkenbachA, Kovacs J, Franke A, Jörnes K, Ammer K:

Rheumatol. Int. 2005; 25: 205 – 210. doi: 10.1007/s00296-003-0419-8.

https://pubmed.ncbi.nlm.nih.gov/14673618/