Cluster 4: oncology eastern group performance cooperative status ecog days registration prior 
Cluster 51: eastern cooperative oncology group ecog performance status patients subject clinical 
Cluster 389: score karnofsky performance eastern cooperative oncology group ecog status lansky 
Cluster 403: ps eastern cooperative ecog oncology group performance status scale score 
Cluster 656: karnofsky eastern cooperative performance oncology ecog group status kps lansky 
Cluster 712: score eastern cooperative group oncology performance ecog status subjects patients 
Cluster 863: expectancy life eastern cooperative ecog group oncology performance status months 
Cluster 1605: score eastern cooperative oncology group ecog performance equal ps subject 
Cluster 1622: eastern cooperative oncology group ecog scale participants enrollment current eligible 
Cluster 1709: performance scale eastern cooperative ecog oncology group status karnofsky ps 
Cluster 1787: swog southwest oncology group performance status southwestern karnofsky zubrod eastern 
Cluster 1984: zubrod eastern oncology cooperative ecog group status performance level karnofsky 
Cluster 2140: age years lansky corresponding scores ecog patients eastern cooperative oncology 
Cluster 2282: eastern cooperative oncology ecog group performance status patient randomization grade