My name is is Luis Leon. I'm a vascular surgeon born in Peru. I did make a school in South America in Peru, and then I did six years of general surgery at Harbor UCLA in Los Angeles. Moving to two extra years of subspecial training in vascular and endovascular training at Loyola University in Chicago, Illinois. And I've been in Arizona for my entire professional life, which has been about 10 years. This afternoon, we're going to discuss very basic concepts of the diagnosis and therapy of the venous disorders.