TY  - RPRT
TI  - Evaluation of a serum optical density method for excluding malabsorption.
AU  - J B GABRIEL
AU  - E VORSANGER
AU  - D T BEER
AU  - M SASS
PY  - 1963
DO  - 10.1093/ajcp/39.5.456
UR  - https://pubmed.ncbi.nlm.nih.gov/13963199/
ID  - 13963199
ER  -