Interactions of fine particle matter and ozone on outpatient visits for circulatory system diseases in Pearl River Delta urban areas
SHI Tong-xing, LIANG Zi-mian, ZHU Ke-jing, GUAN Yi-hua, NING Ting, MA Wen-jun, LIU Tao, XIAO Jian-peng, GU Yu-zhou, ZENG Wei-lin, GUO Ling-chuan, LI Xing
South China Journal of Preventive Medicine . 2019, (2): 115 -118 .  DOI: 10.13217/j.scjpm.2019.0115