1. School of NursingUniversity of Washington Seattle WA USA
2. Department of Biostatistics & EpidemiologyUniversity of Pennsylvania Perelman School of Medicine Philadelphia PA USA
3. Cardiology DivisionHospital of the University of Pennsylvania and the Presbyterian Medical Center of Philadelphia Philadelphia PA USA
4. Division of Cardiovascular MedicineVanderbilt University Medical Center Nashville TN USA
5. University of Pennsylvania School of Nursing Philadelphia PA USA