Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
PUBMED
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
EMBASE
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
Cochrane Library
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
CBM
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
VIP
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
CNKI
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
WanFang
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
LILACS
Literature searches were conducted in PUBMED, EMBASE, Cochrane Library, CBM, VIP, CNKI, WanFang, LILACS and U.S. ClinicalTrials.gov. 
U.S. ClinicalTrials.gov