Cluster 663: clinical concerns safety contraindicate study procedures judgment participation condition compliance 
Cluster 880: provision existing safety pre interfere unstable condition psychiatric medical consent 
Cluster 1618: good health general donor provider medical determined evaluating unstable generally 
Cluster 2072: jeopardize reasonable outlined safety ability receive illness infection concurrent medical 
Cluster 2394: jeopardize safety condition compliance unstable patient subject study investigator medical