Graphic Facilitation: Who are the Pioneers? #52

Graphic Facilitation: Who are the pioneers of graphic facilitation? I would spell out especially 3 individuals: David Sibbet, Sunni Brown and Dan Roam, but today there are many more practitioners around the world (...like Petronela Zainuddin ;). Check out as well the Center for Graphic Facilitation to find more pioneering facilitators.