Scientific evidence:

https://pubmed.ncbi.nlm.nih.gov/12506329/
https://pubmed.ncbi.nlm.nih.gov/7114956/
https://pubmed.ncbi.nlm.nih.gov/28531319/
https://pubmed.ncbi.nlm.nih.gov/11532469/
https://pubmed.ncbi.nlm.nih.gov/6706874/
https://pubmed.ncbi.nlm.nih.gov/21924714/
https://pubmed.ncbi.nlm.nih.gov/11760788/
https://pubmed.ncbi.nlm.nih.gov/17268169/
https://pubmed.ncbi.nlm.nih.gov/12659241/
https://pubmed.ncbi.nlm.nih.gov/11835982/
https://pubmed.ncbi.nlm.nih.gov/23167900/
https://pubmed.ncbi.nlm.nih.gov/26310879/
https://pubmed.ncbi.nlm.nih.gov/24871202/
https://pubmed.ncbi.nlm.nih.gov/29725310/
https://pmc.ncbi.nlm.nih.gov/articles/PMC5324617/
https://www.sciencedirect.com/science/article/pii/S0166432815002570
https://www.tandfonline.com/doi/abs/10.1080/0092623X.2012.665815?journalCode=usmt20