Specimen obtained:Type:Stdy:Gastrointestinal tract.upper:Nom:EGD
specimen obtained:type:stdy:gastrointestinal tract.upper:nom:egd
Specimen obtained:Type:Duration of the study:Gastrointestinal tract.upper:Nominal:EGD
specimen obtained:type:duration of the study:gastrointestinal tract.upper:nominal:egd