https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-8-53
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-8-54
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-8-51
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-8-55
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-8-52