Walgreens Boots Alliance has officially launched its new specialty pharmacy and prescription mail services company with pharmacy benefit manager Prime Therapeutics , a PBM owned by 14 Blue Cross and Blue Shield plans. The new company, AllianceRx Walgreens Prime, begins immediately, executives said Monday, having already negotiated a new retail pharmacy network that began earlier this year between Prime and Walgreens. The new firm establishes much closer ties between Walgreens