Vassileva, Christina M., Theresa Boley, Joseph Standard, Stephen Markwell, and Stephen Hazelrigg. “Relationship Between Patient Income Level and Mitral Valve Repair Utilization”. The Heart Surgery Forum 16, no. 2 (April 3, 2015): E89-E95. Accessed March 28, 2024. https://journal.hsforum.com/index.php/HSF/article/view/457.