Al-Ameri, Alaa H., et al. “Prevalence of Latent TB Infection Among Health Care Workers in Three Main TB Health Facilities, Baghdad, Iraq, 2013”. Journal of the Faculty of Medicine Baghdad, vol. 56, no. 3, Oct. 2014, pp. 339-42, https://doi.org/10.32007/jfacmedbagdad.563533.