Bilateral phaeochromocytomas in von Hippel-Lindau disease: diagnosis by adrenal vein sampling and catecholamine assay - Chew, S L; Dacie, J E; Reznek, R H; Newbould, E C; Sheaves, R; Trainer, P J; Lowe, D G; Shand, W S; Hungerford, J; Besser, G M (Q J Med, 1994)