1. Department of MedicineSchool of Medicine of Temple University, Philadelphia, PA
2. Department of Internal MedicineCrozer Chester Medical Center, Upland, PA
3. Department of MedicineUniversity of Maryland, Baltimore, MD
4. Greater Baltimore Medical CenterBaltimore, Maryland, USA
5. Department of MedicineCrozer Chester Medical Center, Upland, PA
6. University of Pennsylvania School of Nursing, Philadelphia, PA