TY  - RPRT
TI  - Ectopic pregnancy: a look at changing concepts and problems.
AU  - R J Stock
PY  - 1990
DO  - 10.1097/00003081-199009000-00009
UR  - https://pubmed.ncbi.nlm.nih.gov/2225576/
ID  - 2225576
ER  -