Hansen, D, Rasmussen, K, Danielsen, H, Meyer-Hofmann, H, Bacevicius, E, Lauridsen, T G, Madsen, J, Tougaard, B G, Marckmann, P, Thye-Roenn, P, Nielsen, E, Kreiner, S & Brandi, L 2011, ' No difference between alfacalcidol and paricalcitol in the treatment of secondary hyperparathyroidism in hemodialysis patients: a randomized crossover trial ', Kidney International. Supplement, vol. 80, no. 8, pp. 841-50 . https://doi.org/10.1038/ki.2011.226 Hansen, D, Rasmussen, K, Danielsen, H, Meyer-Hofmann, H, Bacevicius, E, Lauridsen, T G, Madsen, J K, Tougaard, B G, Marckmann, P, Thye-Roenn, P, Nielsen, J E, Kreiner, S & Brandi, L 2011, ' No difference between alfacalcidol and paricalcitol in the treatment of secondary hyperparathyroidism in hemodialysis patients: a randomized crossover trial ', Kidney International, vol. 80, no. 8, pp. 841-50 . https://doi.org/10.1038/ki.2011.226