Allen L A, Schoon M G
Br J Obstet Gynaecol. 1983 Oct;90(10):966-8. doi: 10.1111/j.1471-0528.1983.tb06772.x.
At Ngwelezana Hospital, 103 patients admitted from the outpatient clinic with a diagnosis of pelvic infection were laparoscoped and in only 63 was the diagnosis confirmed. A disturbingly high incidence of ectopic pregnancy (8 patients) was found.