Zimmer site: www.pacewithlife.com

American Academy of Orthopedic Surgeons: http://orthoinfo.aaos.org/main.cfm

Carnation Clinic: www.carnationclinic.com/

Dr. Palutsis: www.myorthodoctor.com/zimmer

WebMD 2-incision article: my.webmd.com/content/article/77/90340.htm