Association between c135 G/A genotypes and RET proto-oncogene germline mutations and phenotype of Hirschsprung's disease. - Fitze,G.; Cramer,J.; Ziegler,A.; Schierz,M.; Schreiber,M.; Kuhlisch,E.; Roesner,D.; Schackert,H.K. (Lancet, 2002)