New Test From Quest Diagnostics Helps Physicians Choose HIV Antiretroviral Therapy In Patients With History Of Drug Resistance - Quest Diagnostics Incorporated (NYSE: DGX), the world's leading provider of diagnostic testing, information and services, today announced the availability of a new laboratory developed test designed to help physicians determine whether a patient with a history of HIV drug resistance will respond to the latest class of HIV antiretroviral therapies. [Medical News HIV/AIDS]