TY  - RPRT
TI  - 4-hydroxyestrone, isolation and identification in human urine.
AU  - G Emons
AU  - H O Hoppen
AU  - P Ball
AU  - R Knuppen
PY  - 1980
DO  - 10.1016/0039-128x(80)90069-0
UR  - https://pubmed.ncbi.nlm.nih.gov/7414657/
ID  - 7414657
ER  -