Cluster 141: pregnancy test negative serum female screening focbp days prior wocbp 
Cluster 725: test urine pregnancy negative serum female confirmed days potential positive 
Cluster 1490: pregnancy childbearing female negative test potential serum patients enrollment days 
Cluster 1493: rule females urine pregnancy test childbearing potential feeding blood pregnant 
Cluster 1552: female potential childbearing pregnancy test negative pregnant urine serum feeding