```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>Esophageal refl@14:37:49</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>5</hlevel>
            <item_name>Esophageal reflux</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Digestive system (520-579)\(530) Diseases of esophagus\(530-8) Other specified disorders~\(530-81) Esophageal reflux\</item_key>
            <item_icon>LA</item_icon>
            <tooltip>Diagnoses \ Digestive system \ Diseases of esophagus \ Other specified disorders of esophagus \ Esophageal reflux</tooltip>
            <class>ENC</class>
            <item_is_synonym>true</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all patients with a diagnosis of Esophageal reflux in the Digestive system, specifically under Diseases of esophagus, Other specified disorders of esophagus, within any time frame, using the ICD-9-CM code 530.81. This query has a specificity scale of 0, a panel accuracy scale of 100, and the item is considered a synonym.