system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 55 year old patient presents with history of five episodes of macroscopic hematuria each lasting for about 4 to 5 days in the past five years. Which of the following investigations should be performed to evaluate the suspected diagnosis.
assistant
The correct answer is  None