NaryshkinAWAwTCFilsteinM. Comparison of the performance of serum and urine hCG immunoassays in the evaluation of gynecologic patients. Ann Emergency Med1985; 14: 74–6.
2.
NormanRJLowingsCOliverTChardT. Human chorionic gonadotrophin and subunits—heterogeneity in serum of male patients with tumours of the genital tract. Clin Endocrinol1985; 23: 25–34.