title: Invited commentary.
authors.affiliation: Children's Hospital, Cleveland Clinic, Pediatric and Congenital Heart Surgery/M41, 9500 Euclid Ave, Cleveland, OH44195.
authors.forename: Brian W
authors.initials: BW
authors.lastname: Duncan
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000925:Anticoagulants / Q000627:therapeutic use; D049628:Body Size; D002648:Child; D002675:Child, Preschool; D005260:Female; D016027:Heart Transplantation; D006353:Heart-Assist Devices / Q000706:statistics & numerical data; D006801:Humans; D007223:Infant; D008297:Male; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D000925:Anticoagulants