Authors and affiliations:
1. Wassam ELDin Hadad ELShafey.MD,FRCP.
Affiliation: Menoufia university hospital, Shebein El Koom, Egypt.
Email: dr_wesamhadad@yahoo.com
2. Emad Ali Al Khoufi.MD
Affiliation: internal medicine department, college of medicine, king Faisal University, AL Hasa, Saudi Arabia.
Email:emadco2@hotmail.com