Investigation and analysis of frequency of radiation diagnosis and treatment in medical and health institutions in Chongqing
YANG Yunfu, LI Wei, ZHANG Huadong, LUO Hanghang, LIU Ke
中国辐射卫生 . 2021, (6): 682 -686,692 .  DOI: 10.13491/j.issn.1004-714X.2021.06.005