1. Division of Health Sciences Departments of Pediatric and Family Nursing Graduate School of Medicine Osaka University Suita OsakaJapan
2. Department of Urology Kobe Children's Hospital Kobe HyogoJapan
3. Department of Urology Japan Community Health‐care Organization Hoshigaoka Medical Center Hirakata OsakaJapan
4. Division of Pediatric Urology Riley Hospital for Children at Indiana University Health Indianapolis Indiana USA
5. Department of Biostatistics and Data Science Graduate School of Medicine Osaka University Suita Osaka Japan