Merge pull request #53 from smart-on-fhir/mikix/mention-device

docs: mention that Device isn't implemented yet either

README.md

@@ -11,14 +11,16 @@ The following qualifier metrics are implemented (per June 2024 qualifer definiti
 - [c_resource_count](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#c_resource_count)
 - [c_resources_per_pt](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#c_resources_per_pt)
 - [c_system_use](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#c_system_use)
-- [c_us_core_v4_count](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#c_us_core_v4_count)
-  - Note that the various more-specific Vital Signs profiles are not yet implemented
+- [c_us_core_v4_count](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#c_us_core_v4_count) *
 - [q_date_recent](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#q_date_recent)
 - [q_ref_target_pop](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#q_ref_target_pop)
 - [q_ref_target_valid](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#q_ref_target_valid)
 - [q_system_use](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#q_system_use)
-- [q_valid_us_core_v4](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#q_valid_us_core_v4)
-  - Note that the various more-specific Vital Signs profiles are not yet implemented
+- [q_valid_us_core_v4](https://github.com/sync-for-science/qualifier/blob/master/metrics.md#q_valid_us_core_v4) *
+
+\* These are US Core profile-based metrics, and the following profiles are not yet implemented:
+  - Implantable Device (due to the difficulty in identify implantable records)
+  - The various Vital Signs sub-profiles like Blood Pressure (just haven't gotten around to them yet)
 
 ## Installing