The constant plasma 18-hydroxycorticosterone to aldosterone ratio: an expression of the efficacy of corticosterone methyloxidase type II activity in disorders with variable aldosterone production - Kater, C E; Biglieri, E G; Rost, C R; Schambelan, M; Hirai, J; Chang, B C; Brust, N (J Clin Endocrinol Metab, 1985)