TY  - GEN
AU  - SMITH,E L
TI  - The vitamin B12 group of factors
SN  - 0007-1447
PY  - 2004///0215
KW  - Corrinoids
KW  - Humans
KW  - Vitamin B 12
KW  - Vitamin B Complex
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1136/bmj.1.4699.151
ER  -