<https://www.netdoctor.co.uk/medicines/infection/a7878/tuberculin-purifed-protein-derivative-ppd/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.netdoctor.co.uk/medicines/infection/a7878/tuberculin-purifed-protein-derivative-ppd/>