https://molecularpain.biomedcentral.com/articles/10.1186/1744-8069-4-31
https://molecularpain.biomedcentral.com/articles/10.1186/1744-8069-4-33
https://molecularpain.biomedcentral.com/articles/10.1186/1744-8069-4-32
https://molecularpain.biomedcentral.com/articles/10.1186/1744-8069-4-34