1. Breckons M, Shen J, Bunga J, Vale L, Durham J (2018) DEEP study: indirect and out-of-pocket costs of persistent orofacial pain. J Dent Res 97(11):1200–1206
2. British National Formulary. Series British National Formulary https://www.medicinescomplete.com/mc/bnf/current/. Accessed 20 Aug 2018
3. Brocklehurst PR, Tickle M (2011) Is skill mix profitable in the current NHS dental contract in England? Br Dent J 210(7):303–308
4. Brouwer W, Rutten E, Koopmanschap M (2001) Costing in economic evaluations. In: Drummond M, McGuire A (eds) Economic evaluation in health care: merging theory and practice, 1st edn. Oxford University Press, Oxford
5. Curtis L, Burns A (2018) Unit costs of health and social care. Personal Social Services Research Unit. University of Kent, Canterbury. https://kar.kent.ac.uk/70995/. Accessed 20 Aug 2018