Silvestre, M D A study of factors that may influence the determination of copper, iron, and zinc in human milk during sampling and in sample individuals. [electronic resource] - Biological trace element research Sep 2000 - 217-27 p. digital Publication Type: Clinical Trial; Journal Article ISSN: 0163-4984 Standard No.: 10.1385/BTER:76:3:217 doi Subjects--Topical Terms: AdultBreast--metabolismCircadian Rhythm--physiologyCopper--analysisDietary SupplementsFemaleHumansIron--analysisMilk, Human--chemistrySmokingZinc--analysis