Sonya, Here are links to the source diagrams that Dr. Griffing used in his presentation:
The Clinical-Serologic Classification of Systemic Sclerosis
https://www.hopkinsarthritis.org/wp-content/uploads/2011/04/image-2.jpg
Likely time of onset of visceral involvement in relations to evolution of skin thickening
http://www.med.umich.edu/scleroderma/patients/classification.htm