TY  - RPRT
TI  - Nutrient effects: discrepancy between data from controlled trials and observational studies.
AU  - R P Heaney
PY  - 1997
DO  - 10.1016/s8756-3282(97)00201-9
UR  - https://pubmed.ncbi.nlm.nih.gov/9430234/
ID  - 9430234
ER  -