TY  - RPRT
TI  - Evaluating triphasic oral contraceptives: the rationale for a randomized trial.
AU  - D A Grimes
PY  - 1989
DO  - 10.1016/0002-9378(89)90701-1
UR  - https://pubmed.ncbi.nlm.nih.gov/2686453/
ID  - 2686453
ER  -