2013, Long-term benefits of radon spa therapy in rheumatic diseases: Results of the randomised, multi-centre IMuRa trial

Annegret F, Thomas F.

Rheumatol. Int. 2013;33:2839-3850. doi: 10.1007/s00296-013-2819-8.

https://pubmed.ncbi.nlm.nih.gov/23864139/