| Quest Laboratories + Unilab Inc. |
|---|
| LabCorp Inc. + Dynacare |
| LabOne via Healthcheck USA |
| Bio-reference Laboratories |
| Specialty Laboratories |
| Great Smokies Diagnostic Laboratories |
| Hospital Laboratories |
| Other CLIA approved laboratories |
| Traveling Phlebotomists |
| Point of Care / Home Diagnostic Devices |