Screening for recombinant human erythropoietin using [Hb], reticulocytes, the OFFhr score, OFFz score and Hbz score: status of the Blood Passport - Borno, A.; Aachmann-Andersen, N. J.; Munch-Andersen, T.; Hulston, C. J.; Lundby, C. (European Journal of Applied Physiology, 2010)