Cluster 285: understand able provide consent written informed willing review patients starting 
Cluster 497: assent provide willing able written trial informed consent study participation 
Cluster 606: valid consent informed able written willing provide benefits understanding nature 
Cluster 682: provide able consent informed willing patients patient capable signed study 
Cluster 827: willing written able provide informed consent trial patient subject participate 
Cluster 1880: comply informed consent procedures written able provide study willing requirements 
Cluster 2438: provide written able consent informed patients guardian patient study registration