Schussler, Jeffrey M., Cory H. White, Michael A. Fontes, Stewart A. Master, and Baron L. Hamman. 2009. “Spyder™ Proximal Coronary Vein Graft Patency over Time: The SPPOT Study”. The Heart Surgery Forum 12 (1):E49-E53. https://doi.org/10.1532/HSF98.20081124.