```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>Medicine@14:41:04</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>2</hlevel>
            <item_name>Medicine</item_name>
            <item_key>\\i2b2_PROV\i2b2\Providers\Medicine\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>i2b2 \ Providers \ Medicine</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>2</hlevel>
            <item_name>Circulatory system</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Circulatory system (390-459)\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Circulatory system</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Principal Diagnosis</modifier_name>
                <modifier_key>\\i2b2_DIAG\Principal Diagnosis\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Circulatory system (390-459)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>5</hlevel>
            <item_name>CARDIOLIPIN IGG AB (LOINC:3181-5)</item_name>
            <item_key>\\i2b2_LABS\i2b2\Labtests\LAB\(LLB6) Coagulation\(LLB7) Antiphospholipid Antibodies\ACLIgG\LOINC:3181-5\</item_key>
            <item_icon>LA</item_icon>
            <tooltip>Labtests \ Coagulation \ Antiphospholipid Antibodies \ Anticardiolipin IgG (Group:ACLIgG) \ CARDIOLIPIN IGG AB (LOINC:3181-5)</tooltip>
            <class>ENC</class>
            <constrain_by_value>
                <value_operator>LT</value_operator>
                <value_constraint>10</value_constraint>
                <value_unit_of_measure>gplu</value_unit_of_measure>
                <value_type>NUMBER</value_type>
            </constrain_by_value>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all patients who have been seen by a provider in the Medicine department and have a principal diagnosis related to the Circulatory system (ICD-9 codes 390-459) with a low Anticardiolipin IgG (LOINC:3181-5) lab result (less than 10 gplu).