2019, Effectiveness of spa therapy for patients with chronic low back pain. An updated systematic review and meta-analysis.

Ruixue Bai, Chihua Li, Yangxue Xiao, Manoj Sharma, Fan Zhang, Yong Zhao

Medicine 2019, 98: e17092. Doi: 10.1097/MD.0000000000017092

https://pubmed.ncbi.nlm.nih.gov/31517832/