Lessons learned from the development of oral calcitonin: the first tablet formulation of a protein in phase III clinical trials - Karsdal, M A; Henriksen, K; Bay-Jensen, A C; Molloy, B; Arnold, M; John, M R; Byrjalsen, I; Azria, M; Riis, B J; Qvist, P; Christiansen, C (J Clin Pharmacol, 2011)