Effect of a 12-day balneotherapy programme on pain, mood, sleep, and depression in healthy elderly people

Latorre-Román PÁ1, Rentero-Blanco M, Laredo-Aguilera JA, García-Pinillos F
Psychogeriatrics. 2015 Mar;15(1):14-9. doi: 10.1111/psyg.12068. Epub 2014 Dec 16

https://www.ncbi.nlm.nih.gov/pubmed/25515521