Kayani, A. M.; Bakh, N.; Kiani, W.; Nafees Zaidi, S. S.; Akbar, H.; Abid, I. NON-INVASIVE INVESTIGATIONS IN HEROIN USERS AND NON-USERS-A CASE CONTROL STUDY: Non-Invasive Investigations in Heroin Users And Non- Users. Pak Armed Forces Med J 2017, 67 (1), 112-16.