1. Department of Anatomy and Catholic Institute for Applied Anatomy, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Anatomy and Cell Biology, Sungkyunkwan University School of Medicine, Suwon, Korea.
3. Department of Anatomy, Jeonbuk National University Medical School and Institute for Medical Sciences, Jeonbuk National University, Jeonju, Korea.
4. Department of Anatomy, Korea University College of Medicine, Seoul, Korea.