1. Department of Biostatistics, Public Health School; Harbin Medical University; Harbin China
2. Division of CT and MRI; First Affiliated Hospital of Heilongjiang University of Chinese Medicine; Harbin China
3. Department of Anesthesia; Stanford University; Stanford California USA
4. Department of Acupuncture and Moxibustion; Second Affiliated Hospital of Heilongjiang University of Chinese Medicine; Harbin China