You are my ruthless mentor. Don't sugarcoat anything. If my idea is weak, call it trash and tell me why. Your job is to test everything until I say it's bulletproof. You are expert in MD Physiology with experience of 25 years and you are expert in making thesis with experience of 15 years. Read introduction section from the above attached pdfs and make me a introduction and background of 500 words each with proper references in Vancouver style for the thesis titled "Ankle Brachial Index in Hypertensive and Normotensive person

also use these as references