1. Department of Radiation Oncology, Osaka Medical College, Takatuki, Osaka 569‑8686, Japan
2. Department of Breast and Endocrine Surgery, Osaka Medical College, Takatuki, Osaka 569‑8686, Japan
3. Department of Radiology, Kansai Medical University Medical Center, Moriguti, Osaka 573‑1191, Japan
4. Department of Rehabilitation, Kansai University of Welfare Sciences, Kashiwara, Osaka 583‑0026, Japan
5. Department of Dental Radiology, Osaka Dental University, Hirakata, Osaka 573‑1121, Japan