WORLD HEALTH DIGEST, Volume 08, Issue 47,2011, Pages 249-250, doi:10.3969/j.issn.1672-5085.2011.47.211
National Medical Journal of China, Volume 91, Issue 47,2011, Pages 3374-3376, doi:10.3760/cma.j.issn.0376-2491.2011.47.016
WORLD HEALTH DIGEST, Volume 08, Issue 47,2011, Pages 175-176, doi:10.3969/j.issn.1672-5085.2011.47.140
WORLD HEALTH DIGEST, Volume 08, Issue 47,2011, Pages 214-215, doi:10.3969/j.issn.1672-5085.2011.47.175