Ishikawa, Norihiko, You Su Sun, L. Wiley Nifong, Go Watanabe, and W. Randolph Chitwood. 2008. “How to Do It: Importance of Left Atrial Side Retraction in Robotic and Minimally Invasive Mitral Valve Surgery”. The Heart Surgery Forum 11 (5):E270-E271. https://doi.org/10.1532/HSF98.20071152.