preoperative diagnosis
METHODS: A retrospective chart review was performed on all       children under the age of 16 years, operated on for GER from 1980 to 1997, who       had a preoperative diagnosis of DGE, and at least 6 months of follow-up.
METHODS: A retrospective chart review was performed on all        @OBJECT$  under the age of 16 years, operated on for GER from 1980 to 1997, who        @PREDICAT$  a  @SUBJECT$  of DGE, and at least 6 months of follow-up.