title: Coproporphyrin and oral contraceptives.
authors: A T
authors: AT
authors: Willson
mesh_terms: D003276:Contraceptives, Oral; D003306:Coproporphyrins; D006801:Humans; D011166:Porphyrins
chemical_list: D003276:Contraceptives, Oral; D003306:Coproporphyrins; D011166:Porphyrins