Systematic review and meta-analysis of within-subject and between-subject biological variation estimates of serum zinc, copper and selenium - Coşkun, Abdurrahman; Aarsand, Aasne K.; Braga, Federica; Carobene, Anna; Díaz-Garzón, Jorge; Fernandez-Calle, Pilar; Jonker, Niels; Lao, Elisabet Gonzalez; Marques-Garcia, Fernando; Sandberg, Sverre (Clinical chemistry and laboratory medicine, 2022)