BMI with links to Height and Weight (id = "bmi-using-related")

<?xml version="1.0" encoding="UTF-8"?>
<Observation xmlns="http://hl7.org/fhir"><id value="bmi-using-related"/><!-- ======== need to fix vitals to removed fixed value 'has-member' ==========
 <meta>
 <profile value="http://hl7.org/fhir/StructureDefinition/vitalsigns"/>
 </meta>
 --><text ><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p ><b >Generated Narrative: Observation</b><a name="bmi-using-related"></a></p><div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border:
 1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">Resource Observation &quot;bmi-using-related&quot; </p></div><p ><b >status</b>: <span title=" ======== need to fix vitals to removed fixed value 'has-member' ==========
 &lt;meta&gt;
 &lt;profile value=&quot;http://hl7.org/fhir/StructureDefinition/vitalsigns&quot;/&gt;
 &lt;/meta&gt;
 ">final</span></p><p ><b >category</b>: Vital Signs <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/5.1.0/CodeSystem-observation-category.html">Observation Category Codes</a>#vital-signs)</span></p><p ><b >code</b>: BMI <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="https://loinc.org/">LOINC</a>#39156-5 &quot;Body mass index (BMI) [Ratio]&quot;)</span></p><p ><b >subject</b>: <a href="patient-example.html">Patient/example</a> &quot;Peter CHALMERS&quot;</p><p ><b >effective</b>: 1999年07月02日</p><p ><b >value</b>: 16.2 kg/m2<span style="background: LightGoldenRodYellow"> (Details: UCUM code kg/m2 = 'kg/m2')</span></p><p ><b >derivedFrom</b>: </p><ul ><li ><a href="broken-link.html">Observation/bodyheight: Body Height</a></li><li ><a href="observation-example.html">Observation/example: Body Weight</a></li></ul></div></text><status value="final"/><category ><coding ><system value="http://terminology.hl7.org/CodeSystem/observation-category"/><code value="vital-signs"/><display value="Vital Signs"/></coding><text value="Vital Signs"/></category><code ><coding ><system value="http://loinc.org"/><code value="39156-5"/><display value="Body mass index (BMI) [Ratio]"/></coding><text value="BMI"/></code><subject ><reference value="Patient/example "/></subject><effectiveDateTime value="1999年07月02日"/><valueQuantity ><valuevalue="16.2"/><unitvalue="kg/m2"/><systemvalue="http://unitsofmeasure.org"/><codevalue="kg/m2"/></valueQuantity><derivedFrom ><reference value="Observation/bodyheight"/><display value="Body Height"/></derivedFrom><derivedFrom ><reference value="Observation/example "/><display value="Body Weight"/></derivedFrom></Observation>