Pernicious Anaemia
BMJ 369:m1319, Mohamed, M.,et al, 2020
Neurologic Aspects of Cobalamin Deficiency
Medicine 70:229-245, Healton,E.B.,et al, 1991
Subacute Combined Degeneration of the Spinal Cord
In Rowland's, Merritt's Textbk of Neurology, Lea & Febiger, Phila, 8th Ed, p. 691, Mancall,E.L., 1989