Chinese Journal of Preventive Medicine, Volume 53, Issue 6,2019, Pages 559-564, doi:10.3760/cma.j.issn.0253-9624.2019.06.004
Chinese Journal of Preventive Medicine, Volume 53, Issue 6,2019, Pages 653-656, doi:10.3760/cma.j.issn.0253-9624.2019.06.021
Chinese Journal of Preventive Medicine, Volume 53, Issue 6,2019, Pages 625-627, doi:10.3760/cma.j.issn.0253-9624.2019.06.016
Chinese Journal of Preventive Medicine, Volume 53, Issue 6,2019, Pages 602,