Yap, C.-H., P. D. Skillington, G. Matalanis, B. B. Davis, B. D. Tait, F. Hudson, L. Ireland, I. Nixon, and M. Yii. “Human Leukocyte Antigen Mismatch and Other Factors Affecting Cryopreserved Allograft Valve Function”. The Heart Surgery Forum, vol. 11, no. 1, Feb. 2008, pp. E42-E45, doi:10.1532/HSF98.20071104.