1. Department of Cardiac Surgery, The First Hospital of Hebei Medical University, Hebei, Shijiazhuang, China (mainland)
2. Department of Cardiovascular Medicine, The First Hospital of Hebei Medical University, Hebei, Shijiazhuang, China (mainland)
3. Department of Pediatrics, Ningjin County Hospital of Hebei, Hebei, Shijiazhuang, China (mainland)
4. Department of Vascular Surgery, The First Hospital of Hebei Medical University, Hebei, Shijiazhuang, China (mainland)