Multicenter Study

Impact of hospital volume on chest tube duration, length of stay, and mortality after lobectomy.

Ann. Thorac. Surg. 2011 Sep 1;92(3):1069-74.
Multicenter Study

Specificity of procedure volume and in-hospital mortality association.

Ann. Surg. 2007 Jul 1;246(1):135-9.
Multicenter Study

Impact of surgical approach on complications and resource utilization of cervical spine fusion: a nationwide perspective to the surgical treatment of diffuse cervical spondylosis.

Spine J. 2009 Jan 1;9(1):31-8.