Authors’ addresses: Melody Lyn Chipeio and Christian John Hunter, School of Medicine, University of Namibia Faculty of Health Sciences, Windhoek, Namibia, E-mails: mechipeio@gmail.com and chunter@unam.na. Anousheh Sayah, Department of Radiology, MedStar Georgetown University Hospital, Washington, DC, E-mail: anousheh.sayah@gunet.georgetown.edu.