OPEN MINDS The Behavioral Health & Social Service Industry Analyst Industry News Princeton Diagnostic Laboratories of America Inc. has formed a subsidiary, National Consortium For A Drug-Free Workplace. The National Consortium is a consulting firm that assists organizations with their drug testing programs by providing program and policy development; medical review officers; education and training; and collection facilities. According to Susan Tavis, Marketing Director of Princeton Diagnostics, the National Consortium is currently providing expert services for many organizations, including the development of drug testing programs for over 30 airlines.