title: Recognition of variable bioavailability as an international problem: a review of the earlier studies.
mesh_terms: D000042:Absorption; D001682:Biological Availability; D001702:Biopharmaceutics; D004077:Digoxin / Q000378:metabolism / Q000592:standards*; D004345:Drug Industry; D006801:Humans; D007391:International Cooperation; D012995:Solubility; D013607:Tablets
chemical_list: D013607:Tablets; D004077:Digoxin