Al Halees Z, Awad M M, Pieters F, Shahid M S, Al Amri M A
Department of Cardiovascular Diseases (MBC-16), King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.
J Thorac Cardiovasc Surg. 1999 Mar;117(3):614-6. doi: 10.1016/s0022-5223(99)70345-4.