```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>Laboratory Test@12:09:47</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>1</hlevel>
            <item_name>Laboratory Tests</item_name>
            <item_key>\\i2b2_LABS\i2b2\Labtests\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Labtests</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>2</hlevel>
            <item_name>Nutritional deficiences</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Nutritional deficiences (260-269)\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Nutritional deficiences</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Admit Diagnosis</modifier_name>
                <modifier_key>\\i2b2_DIAG\Admit Diagnosis\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Nutritional deficiences (260-269)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all laboratory tests related to nutritional deficiencies (ICD-9 codes 260-269) that have been performed on patients, with a high level of accuracy, and the results were recorded at any time. This query will be applied to the "Admit Diagnosis" modifier, which means it will only include laboratory tests conducted for patients who have been diagnosed with nutritional deficiencies upon admission.