1. Lawson Tait: the forgotten gynecologist.;Golditch;Obstet Gynecol,2002
2. Slide immunological pregnancy test.;Little;JAMA,1964
3. Immunological diagnosis of pregnancy by the anti-HCG serum test.;Antunes;Matern Infanc,1966
4. Ultrasound. An aid in the diagnosis of ectopic pregnancy.;Kobayashi;Obstet Gynecol,1969
5. Combined use of serum HCG and sonography in the diagnosis of ectopic pregnancy.;Kadar;Am J Roentgenol,1983