Kappas, A Studies in endocrine pharmacology. Biologic actions of some natural steroids on the liver. [electronic resource] - The New England journal of medicine 02 1968 - 378-84 p. digital Publication Type: Journal Article ISSN: 0028-4793 Standard No.: 10.1056/NEJM196802152780707 doi Subjects--Topical Terms: Culture TechniquesEstradiol--pharmacologyEstriol--pharmacologyFemaleHeme--biosynthesisHumansLiver--drug effectsLiver Function TestsPorphyrias--metabolismPorphyrins--biosynthesisPregnancySteroids--pharmacology