Problem: Ms. Chen is a 65-year-old female with atrial fibrillation. She has been taking warfarin with a target INR of 2-3. Her current INR is 3.5, and she reports no recent dietary changes or new medications. Which of the following patient factors should be re-evaluated in Ms. Chen's case to understand the cause of her elevated INR? Need Assignment Help? Select all that apply a) Recent changes in diet, specifically foods rich in vitamin K. b) Compliance with warfarin dosing. c) Potential interactions with over-the-counter supplements or herbal products. d) Presence of any acute illnesses or changes in health status.