CVS Health Corp. said on Monday it expects to complete its acquisition of healthcare services company Signify Health this week, subject to certain conditions, potentially ending months of antitrust scrutiny on the $8 billion deal.

CVS’ potential acquisitions of two healthcare service providers Signify and Oak Street Health, along with other such deals, have been facing increasing scrutiny over their impact on cost of healthcare in the United States.

Earlier this month, Sen. Elizabeth Warren (D-Mass.) urged the Federal Trade Commission to review healthcare conglomerate CVS’ $9.5-billion acquisition of Oak Street as well as other merger deals in the sector.