GDNF as a candidate modifier in a type 1 neurofibromatosis (NF1) enteric phenotype. Issue 9 (1st September 2001) - Bahuau, Michel; Pelet, Anna; Vidaud, Dominique; Lamireau, Thierry; Le Bail, Brigitte; Munnich, Arnold; Vidaud, Michel; Lyonnet, Stanislas; Lacombe, Didier