Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0936-6555(19)30092-5
Head and Neck Cancer free resource MedlinePlus Health Information https://medlineplus.gov/headandneckcancer.html
subscription/membership/fee required ClinicalKey https://www.clinicalkey.com/content/playBy/pii?v=S0936-6555(19)30092-5
Full text from free resource White Rose Research Online https://eprints.whiterose.ac.uk/145353/