title: Authors' Response.
authors.affiliation: Department of Cardiology, University of Pittsburgh Medical Center Heart and Vascular Institute, Pittsburgh, PA, USA henrybl@upmc.edu.
authors.forename: Brian L
authors.initials: BL
authors.lastname: Henry
authors.affiliation: Division of Hematology-Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Rohit
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Division of Hematology-Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Roy E
authors.initials: RE
authors.lastname: Smith