Plasma 5-α-androstane-3α-17β-diol, an endogenous steroid that positively modulates GABA receptor function, and anxiety: a study in menopausal women. - Barbaccia,M.L.; Lello,S.; Sidiropoulou,T.; Cocco,T.; Sorge,R.P.; Cocchiarale,A.; Piermarini,V.; Sabato,A.F.; Trabucchi,M.; Romanini,C. (Psychoneuroendocrinology, 2000)