Mutations of the PRKAR1A gene in Cushing's syndrome due to sporadic primary pigmented nodular adrenocortical disease - Groussin, L; Jullian, E; Perlemoine, K; Louvel, A; Leheup, B; Luton, J P; Bertagna, X; Bertherat, J (J Clin Endocrinol Metab, 2002)