National Medical Journal of China, Volume 99, Issue 21,2019, Pages 1636-1640, doi:10.3760/cma.j.issn.0376-2491.2019.21.009
National Medical Journal of China, Volume 99, Issue 21,2019, Pages 1669-1670, doi:10.3760/cma.j.issn.0376-2491.2019.21.016
National Medical Journal of China, Volume 99, Issue 21,2019, Pages 1608-1610, doi:10.3760/cma.j.issn.0376-2491.2019.21.003
National Medical Journal of China, Volume 99, Issue 21,2019, Pages 1611-1614, doi:10.3760/cma.j.issn.0376-2491.2019.21.004
National Medical Journal of China, Volume 99, Issue 21,2019, Pages 1645-1650, doi:10.3760/cma.j.issn.0376-2491.2019.21.011