```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>Laparos-Body ma@13:33:41</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>6</hlevel>
            <item_name>Laparoscopic cholecystectomy</item_name>
            <item_key>\\i2b2_PROC\i2b2\Procedures\PRC\ICD9 (Inpatient)\(42-54) Operations on digestive system\(p51) Operations on gallbladder a~\(p51-2) Cholecystectomy4\(p51-23) Laparoscopic cholecystec~\</item_key>
            <item_icon>LA</item_icon>
            <tooltip>Procedures \ ... \ Operations on digestive system \ Operations on gallbladder and biliary tract \ Cholecystectomy \ Laparoscopic cholecystectomy</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
    <panel>
        <panel_number>2</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>4</hlevel>
            <item_name>Body mass index (bmi) 30-39, adult</item_name>
            <item_key>\\ICD10_ICD9\Diagnoses\(Z00-Z99) Fact~rmj9\(Z68-Z68) Body~zq26\(Z68) Body mas~9tue\(Z68.3) Body m~c6tz\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Factors influencing health status and contact with health services (z00-z99) \ Body mass index (bmi) (z68) \ Body mass index (bmi)
 \ Body mass index (bmi) 30-39, adult</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all patients who have undergone laparoscopic cholecystectomy and have a body mass index (BMI) between 30-39. The specificity scale is set to 0, indicating that the results should be as precise as possible, and the query timing is set to ANY, meaning that the events could have occurred at any time. The panel accuracy scale is set to 100, implying that all panels must be accurate. The query consists of two panels: the first panel focuses on the procedure 'Laparoscopic cholecystectomy' and the second panel focuses on the diagnosis 'Body mass index (BMI) 30-39, adult'. The class is set to ENC, indicating that the items are encoded concepts, and no synonyms are used in this query.