Study to Evaluate the Efficacy and Safety of DWP14012 in Patients With Erosive Gastroesophageal Reflux Disease (Phase 2, Therapeutic Exploratory Study)

Inclusion Criteria: * Adults between 20 and 75 years old based on the date of written agreement * Those who have been diagnosed with erosive gastroesophageal reflux disease(EGRD) of LA Grade A-D on the upper gastrointestinal endoscopy * Those who experienced symptoms of heartburn or acid reflux within the last 7 days Exclusion Criteria: * Those who have undergone gastric acid suppression or gastric, esophageal surgery * Those who with clinically significant liver, kidney, nervous system, respiratory, endocrine, hematologic, cardiovascular, urinary system disease