1. Phenylketonuria due to phenylalanine hydroxylase deficiency: an unfolding story;BMJ,1993
2. The hyperphenylalaninemias;Scriver,2001
3. Zur Haufigkeit der phenylketonurie mit normaler intelligenz;Machill;Z Klin Med,1990
4. Prenatal testing for maternal phenylketonuria (MPKU);Hanley;Int Pediatr,1994
5. Genotype and intellectual phenotype in untreated phenylketonuria patients;Ramus;Pediatr Res,1999