```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>Parkins-Vitamin@14:18:42</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>3</hlevel>
            <item_name>Parkinson's disease</item_name>
            <item_key>\\ICD10_ICD9\Diagnoses\(G00-G99) Dise~j8kq\(G20-G26) Extr~y5jy\(G20) Parkinso~nq8o\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Diseases of the nervous system (g00-g99) \ Extrapyramidal and movement disorders (g20-g26) \ Parkinson's disease</tooltip>
            <class>ENC</class>
            <item_is_synonym>true</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>Vitamin b6 deficiency</item_name>
            <item_key>\\ICD10_ICD9\Diagnoses\(E00-E89) Endo~c157\(E50-E64) Othe~mk8w\(E53) Deficien~0g5r\(E53.1) Pyrido~9b2o\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Endocrine, nutritional and metabolic diseases (e00-e89) \ Other nutritional deficiencies (e50-e64) \ Deficiency of other b group vitamins
 \ Vitamin b6 deficiency</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find patients who have been diagnosed with Parkinson's disease (ICD code G20) and also have a deficiency of Vitamin B6 (ICD code E53.1) in their medical records. The query will search for these specific diagnoses using the ICD-9-CM codes, and the search will be inclusive of all encounters (ANY timing). The specificity scale is set to 0, indicating that all occurrences of these diagnoses should be included in the search. The panel accuracy scale is set to 100, indicating the highest level of confidence in the results.