Department of Internal Medicine;
the CHI St.Alexius Health;
Bismarck;
USA;
Department of Internal Medicine;
University of North Dakota;
Bismarck;
USA;
Center for Advanced Heart and Lung Diseases;
Baylor University Medical Center;
Dallas;
USA;
Department of Internal Medicine;
University of Kentucky;
Lexington;
USA;
Department of Internal Medicine;
Lincoln Medical Center Weil Cornell University;
Bronx;
USA;
Department of Cardiovascular Medicine;
Tanta University;
Tanta;
Egypt;
Department of Cardiovascular Disease;
University of Toledo;
Toledo;
USA;
Faculty of Medicine;
Tanta University;
Tanta;
Egypt;
Department of Internal Medicine;
East Carolina University;
Greenville;
USA;
Faculty of Medicine;
Ain Shams University;
Cairo;
Egypt;
College of Medicine;
Texas A&M Health Science Center;
Dallas;
USA;