Is basal ultrasensitive measurement of calcitonin capable of substituting for the pentagastrin-stimulation test? - Pina, G; Dubois, S; Murat, A; Berger, N; Niccoli, P; Peix, J L; Cohen, R; Guillausseau, C; Charrie, A; Chabre, O; Cornu, C; Borson-Chazot, F; Rohmer, V; Groupe des Tumeurs E (Clin Endocrinol (Oxf), 2013)