An Exploratory Study of Units of Reporting Opium Usein Iran: Implications for Epidemiologic Studies.
Elham MohebbiFarin KamangarAfarin Rahimi-MovagharAli Akbar HaghdoostArash EtemadiSaber AmirzadehFarid NajafiFariba ShafeieAli FakhariKarim GhalebanSoodabeh Shahid-SalesZeinab Sadat HosseiniMohammad Reza HonarvarFatemeh MajnooniMaryam HadjiKazem ZendehdelPublished in: Archives of Iranian medicine (2019)
In conclusion, the reported amount of opium use is highly inaccurate and unreliable, and is mainly subject to underestimation.