<https://blogs.bmj.com/bmj/#/schema/person/image/>
<http://schema.org/url>
<https://secure.gravatar.com/avatar/125bd41f51c331d2a99900d70e26a36f?s=96&d=mm&r=g>
<https://blogs.bmj.com/bmj/2016/02/11/martin-marshall-confused-about-general-practice/>