Cluster 386: investigational device drug study days treatment participation currently agent trial 
Cluster 481: month participation study clinical product investigational involved preceding involving medication 
Cluster 623: trial trials included participation agents investigational duration clinical start days 
Cluster 1571: trial investigational participation clinical agent days drug prior treatment study 
Cluster 1646: participation study investigational clinical involving drug days weeks studies prior 
Cluster 1648: therapeutic weeks study participation drug treatment clinical molecule participated procedures 
Cluster 1652: investigation participated clinical dosing investigational month currently drug prior patients 
Cluster 2111: product participation clinical investigational study weeks days receipt months prior 
Cluster 2450: allergy suspected agent given trial known course sorafenib association investigational