Looking a Gift Horse in the Mouth: Observations on NHS England's Interim Guidance on Pembrolizumab in Head and Neck Squamous Cell Cancer. Issue 8 (August 2020) - Harrington, K.J.; Bhide, S.A.; Forster, M.D.; Good, J.S.; Gunn, L.; Kong, A.; Melcher, A.A.; Metcalf, R.; Nenclares, P.; Newbold, K.L.; Nutting, C.M.; Prestwich, R.; et al.