1. Bravo EL, Tarazi RC, Fouad FM, Vidt DG, Gifford RW (1981) Clonidine suppression test. A useful aid in the diagnosis of pheochromocytoma. N Engl J Med 305:623–626
2. Conn JW, Knopf RF, Nesbit RM (1964) Clinical characteristics of primary aldosteronism from an analysis of 145 cases. Am J Surg 107:159–172
3. Cordes U, Beyer J (1981) Diagnostik des Phäochromocytoms. Med Klinik 76:242–248
4. Fischer M, Winterberg B, Vetter H (1982) Nebennierenmarksszintigraphie. Nuclear Compact 13:26–27
5. Gifford RW, Kvale WF, Maher FT, Roth GM, Priestly JT (1964) Clinical features, diagnosis and treatment of pheochromocytoma: a review of 76 cases. Mayo Clin Proc 39:281–302