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Rectal electromyogram (EMG)
Rectal examination, digital
Red blood cell (erythrocyte) fractionation
Red blood cell (erythrocyte) fragility
Red blood cell (erythrocyte) volume
Red blood cell cholinesterase (acetylcholinesterase)
Red blood cell imaging, liver
Red blood cell survival time test
Red marbled-topped tube
Red serum separator tubes
Red-topped (plain) tube
Reducing substances test, stool
Refrigerated specimens
Renal (kidney) ultrasound
Displaying items 31 - 60 of 142