```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>WHITE BLOOD COU@11:23:32</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>WHITE BLOOD COUNT (LOINC:6690-2)</item_name>
            <item_key>\\i2b2_LABS\i2b2\Labtests\LAB\(LLB53) Hematology\(LLB57) Complete Blood Count\WBC\LOINC:6690-2\</item_key>
            <item_icon>LA</item_icon>
            <tooltip>Labtests \ Hematology \ Complete Blood Count \ WBC (Group:WBC) \ White Blood Count (LOINC:6690-2)</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all instances of white blood count (WBC) measurements recorded in the i2b2 database using the LOINC code 690-2, with no specific timing or accuracy constraints, and with a specificity scale of 0 and invert flag set to 0. This query should be part of a panel with panel number 1, with a timing of ANY and an accuracy scale of 100, and should be the only item in the panel.