title: Description of the participating centers and the patient population in the National Cooperative Dialysis Study.
mesh_terms: D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D005260:Female; D006436:Hemodialysis Units, Hospital; D006801:Humans; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis; D014511:Uremia / Q000628:therapy