TY - JOUR AU - Wu, Wei AU - Wu, Meng AU - Wang, Yongli AU - Jiang, Xuesheng AU - Li, Gang PY - 2020 TI - Ultrasonic examination of differences in bone density of chronic obstructive pulmonary disease (COPD) rats constructed by different methods JF - Annals of Palliative Medicine; Vol 9, No 4 (July 25, 2020): Annals of Palliative Medicine Y2 - 2020 KW - N2 - UR - https://apm.amegroups.org/article/view/44816