Authors’ addresses: Ashraf O. E. Ahmed and Mouhand F. H. Mohamed, Hamad Medical Corporation, Internal Medicine Department, Hamad Medical Corporation, Doha, Qatar, E-mails: ashrafzone1@gmail.com and dr.m.oraiby@hotmail.com. Khalid Ahmed, Hamad Medical Corporation, Acute Care Surgery Department, Hamad Medical Corporation, Doha, Qatar, E-mail: drhanfuli@hotmail.com.