Aarsand, A. K., Røraas, T., Fernandez-Calle, P., Ricos, C., Díaz-Garzón, J., Jonker, N., Perich, C., González-Lao, E., Carobene, A., Minchinela, J., Coşkun, A., Simón, M., Álvarez, V., Bartlett, W. A., Fernández-Fernández, P., Boned, B., Braga, F., Corte, Z., Aslan, B., & Sandberg, S. (2018). the Biological Variation Data Critical Appraisal Checklist: A Standard for Evaluating Studies on Biological Variation. Clinical chemistry, 64, 501–514. http://access.bl.uk/ark:/81055/vdc_100116969143.0x000053