1. Medical College of Qingdao University, Qingdao; The Second Affiliated Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong
2. Institute for Neurological Research, The Second Affiliated Hospital; School of Basic Medical Sciences of Shandong First Medical University & Shandong Academy of Medical Sciences,Taian, Shandong
3. Cheeloo College of Medicine, Shandong University, Jinan, Shandong
4. Department of Ultrasonic Diagnosis and Treatment, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong
5. Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China