1. From the Departments of Pathology (Dr. Ul Haque) and Surgery (Dr. Tamimi), King Faisal University, College of Medicine and Medical Sciences, Dammam, Saudi Arabia; Department of Pathology (Dr. Ali), King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia; and Department of Pathology (Dr. Platz), University of Iowa Hospital, Iowa City, Iowa, USA