https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-9-12
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-9-14
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-9-13
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-9-16
https://bmccomplementmedtherapies.biomedcentral.com/articles/10.1186/1472-6882-9-15