Cases presenting special difficulty are referred to the following specialists nominated by the presidents of the Royal College of Physicians and the Royal College of Surgeons:
- Sir Walter Langdon-Brown, M.D., F.R.C.P.
- E. Rock Carling, Esq., M.B., F.R.C.S.
- Anthony Feiling, Esq., M.D., F.R.C.P.
