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The Virtual Hospital - University of Iowa Family Practice Handbook: Chapter 6: Rheumatology/Orthopedics. [http://indy.radiology.uiowa.edu/Providers/ClinRef/FPHandbook/06.html]
The Virtual Hospital - Introduction to Clinical Radiology: Skeletal. [http://indy.radiology.uiowa.edu/Providers/Lectures/icmrad/skeletal/Skeletal.html]