McKinsey Opened a Door in Its Firewall Between Pharma Clients and Regulators. McKinsey & Co, Conflicts of Interest, Purdue Pharma, Food and Drug Administration, Opioids and Opiates, Pain-Relieving Drugs, Regulation and Deregulation of Industry, Drugs (Pharmaceuticals), Azar, Alex M II, Consultants, Government Contracts and Procurement