1. Systematic review of past medical history 2. Detailed physical examination 3. Routine blood, urine and fecal examination, liver and kidney function tests, thyroid function, blood clotting function, hepatitis B and C examination, HIV and syphilis examination, etc. 4. The doctor will discuss the appropriate treatment plan for you and further determine whether you are eligible for this procedure. You and your family will be informed of the specific medical plan