Prolonged effects of 3 week therapy in a spa resort on lumbar spine, knee and hip osteoarthritis: follow-up after 6 months. A randomized controlled trial

Nguyen M, Revel M, Dougados M
Br J Rheumatol. 1997 Jan;36(1):77-81

https://www.ncbi.nlm.nih.gov/pubmed/9117181