To guide users to one (and only one) way to code data, this duplicate concept
should be made non-standard.
It is a duplicate of this concept http://athena.ohdsi.org/search-terms/terms/9191
(see covid19 elt guidance post elsewhere on the forum)
Same duplication appears for Negative http://athena.ohdsi.org/search-terms/terms/9189
(or if we like the relationships LOINC has for LA codes, then remove the duplication the other way round (making the SNOMED term non-standard).
(this is a problem with LOINC SNOMED sub-optimal coordination; well, the values should be in license free GPS subset of SNOMED and than LOINC can freely use them in copyleft manner)