Multifrequency rhythmic modulation notably in melstonin and dehydrospiandrosterone sulfate, and risk of developing major diseases - Halberg, F; Hermida, R; Wrba, H; Wetterberg, L; Halberg, E; Sanchez, S; Marques, Nélson; Mushiya, T; Ungar, F; Cornelissen, G (International Symposium of Psychoneuroendocrinology in Reproduction, 1985)