Occurrence and distribution of bone metastases in 984 metastatic breast cancer patients

Department of Breast Oncology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing, China; Department of Breast Oncology, PLA 307 Clinical College of Anhui Medical University, Beijing, China; Department of Medical Molecular Biology, Beijing Institute of Biotechnology, Academy of Military Medical Sciences, Beijing, China; Department of Breast Oncology, Academy of Military Medical Sciences, Beijing, China Contributions: (I) Conception and design: Z Jiang; (II) Administrative support: Z Jiang; (III) Provision of study materials or patients: All authors; (IV) Collection and assembly of data: H Nie; (V) Data analysis and interpretation: Z Jiang, H Nie, J Li; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Shaohua Zhang. Department of Breast Oncology, The Fifth Medical Center of Chinese PLA General Hospital, No. 8 Dong Street, Fengtai District, Beijing 100071, China. Email: zhangsh19760428@163.com.