Abstract

Keywords
References
1.
Matthews
DM
Linnell
JC
. Vitamin B12: An area of darkness . BMJ 1979 ;ii :533 –5 .
2.
Lederle
FA
. Oral cobalamin for pernicious anaemia . JAMA 1991 ;265 :94 –5 .
3.
Berlin
R
. Written communication, Nov. 1989 (cited by Lederle FA , JAMA 1991 ;265 :94 –5 ).
4.
Matthews
DM
. Distribution of cobalamins in the animal body . In:
Zagalak
B
Friedrich
W
, eds. Vitamin B12: Proceedings of the 3rd European Symposium . Berlin : De Gruyter , 1979 :681 –94 .
5.Drugs and Therapeutics Bulletin 1984 ;22 :43 –4 .
6.
Chipping
PM
. Vitamin B12 deficiency . Presenters' J 1988 ;28 :117 –24 .
7.British National Formulary . March 1991 :296 –7 .
8.
Freeman
AG
. Optic neuropathy and chronic cyanide intoxication: A review . J R Soc Med 1988 ;18 :103 –6 .
9.
Wilson
J
Linnell
JC
Matthews
DM
. Plasma-cobalamins in neuro-ophthalmological diseases . Lancet 1971 ;i :777 –8 .
10.
Wilson
J
Matthews
DM
. Metabolic inter-relationships between cyanide, thiocyanate and vitamin B12 in smokers and non-smokers . Clin Sci 1966 ;31 :1 –7 .
11.
Foulds
WS
Bronte-Stewart
JM
Chisholm
IA
. Serum — Thiocyanate concentrations in tobacco amblyopia . Nature (Lond) 1968 ;218 :586 .
12.
Foulds
WS
Freeman
AG
Phillips
CI
Wilson
J
. Cyanocobalamin: A case for withdrawal ; Lancet 1970 ;i :35 .
13.
Freeman
AG
Wilson
J
Foulds
WS
Phillips
CI
. Why has cyanocobalamin not been withdrawn? Lancet 1978 ;i :777 –8 .
14.Commitee on Safety of Medicines , Current problems , July 1981 :6 .
15.
Linnell
JC
Matthews
DM
England
JM
. Therapeutic misuse of cyanocobalamin . Lancet 1978 ;ii :1053 –4 .
16.Monthly Index of Medical Specialities , January 1991 :178 .
17.
Terry
SI
Nicholson
GD
. Survival of cyanocobalamin . Lancet 1978 ;ii :848 .
18.
Heaton
JM
McCormick
AJA
Freeman
AG
. Tobacco amblyopia: A clinical manifestation of vitamin B12 deficiency . Lancet 1958 ;ii :286 –90 .
19.
Freeman
AG
Heaton
JM
. The aetiology of retrobulbar neuritis in Addisonian pernicious anaemia . Lancet 1961 ;i :908 –11 .
20.
Osuntokum
BO
Osuntokun
O
. Tropical amblyopia . Am J Ophthalmol 1971 ;72 :708 –16 .
21.
Freeman
AG
. Chronic cyanide intoxication . BMJ 1981 ;282 :1321 .
22.
Freeman
AG
. Food and cyanide . BMJ 1972 ;ii :49 .
