https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0834-2
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0841-3
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0846-y
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0844-0
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0842-2
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0848-9
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0847-x
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0833-3
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0838-y
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0845-z
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0843-1
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0831-5
https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-018-0850-2