The effect of mud pack therapy on serum YKL-40 and hsCRP levels in patients with knee osteoarthritis.

Güngen G, Ardic F, Fındıkoğlu G, Rota S
Rheumatol Int. 2012 May;32(5):1235-44. doi: 10.1007/s00296-010-1727-4. Epub 2011 Jan 22

https://www.ncbi.nlm.nih.gov/pubmed/21258804