TY  - RPRT
TI  - Low-dose progestagens and ectopic pregnancy.
AU  - R Corcoran
AU  - R Howard
PY  - 1977
DO  - 10.1016/s0140-6736(77)91116-3
UR  - https://pubmed.ncbi.nlm.nih.gov/63740/
ID  - 63740
ER  -