From my research, it is my understanding that PAS/OAS is a marketing company that spawned out from VantageRx due to the growing demand from the allergy fingerstick test coupled with the Allerdent immunotherapy option. https://vantagerx.com/index.html https://www.ptcommunity.com/wire/arrayit-corporation-announces-nationwide-allergy-testing-sales-and-distribution-network https://www.globenewswire.com/news-release/2017/12/19/1266153/0/en/New-Test-and-Treatment-Allergy-Program-Enables-All-Physicians-To-Provide-Convenient-And-Effective-Allergy-Care.html https://www.ptcommunity.com/wire/arrayit-corporation-announces-allergy-testing-partnerships-major-allergy-therapeutics-providers https://investorshub.advfn.com/boards/read_msg.aspx?message_id=149154347 https://m.facebook.com/Pediatricallergysolutions/videos/?ref=page_internal&mt_nav=0 https://storage.googleapis.com/wzukusers/user-27922100/documents/5be9c697a0feacHGfCzT/01)%20PAS%20-%20Sales%20-%20Sample%20Report%20-%20110118-2.pdf https://optimumallergysolutions.com/va https://optimumallergysolutions.com/telemed-va/