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
The natural history of disease is best established by:
assistant
The correct answer is  The Natural history of disease is best established by coho studies. COHO STUDY: Forward looking study Prospective study Cause to effect study Risk factor to disease study Exposure to outcome study Follow-up study Incidence study