A case in point: exclusions and replacements for exclusions after randomization in clinical trials.
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D000763:Anesthesia, Caudal; D000768:Anesthesia, General; D002395:Catecholamines / Q000097:blood; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008297:Male; D018579:Patient Selection; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D013223:Statistics as Topic
D002395:Catecholamines