title: Effect of storage and repeated freeze/thaw on (S) vitamin B12.
authors.affiliation: Bureau of Nutritional Sciences, Food Directorate, Health Canada, Canada.
authors.forename: Penny
authors.initials: P
authors.lastname: Jee
authors.affiliation: Bureau of Nutritional Sciences, Food Directorate, Health Canada, Canada.
authors.forename: Lois
authors.initials: L
authors.lastname: Fernandez
authors.affiliation: Department of Pathology & Laboratory Medicine, The Ottawa Hospital, Ottawa, ON, Canada; Department of Pathology & Laboratory Medicine, University of Ottawa, Ottawa, ON, Canada.
authors.forename: Sherry L
authors.initials: SL
authors.lastname: Perkins
authors.affiliation: Bureau of Nutritional Sciences, Food Directorate, Health Canada, Canada.
authors.forename: Stephen P J
authors.initials: SP
authors.lastname: Brooks
mesh_terms: D001800:Blood Specimen Collection / Q000379:methods*; D004356:Drug Storage / Q000379:methods*; D005615:Freezing; D006801:Humans; D015203:Reproducibility of Results; D013997:Time Factors; D014805:Vitamin B 12 / Q000032:analysis* / Q000097:blood
chemical_list: D014805:Vitamin B 12