Apparent cortisone reductase deficiency: a defect in 11β-hydroxysteroid dehydrogenase type 1 or in cortisone 5β-reductase? - Jamieson,A.; Wallace,A.M.; Walker,B.R.; Andrew,R.; Fraser,R.; White,P.C.; Connell,J.MC. (J Clin Endocrinol Metab, 1999)