1. Johns Hopkins University; Department of Acute and Chronic Care, School of Nursing; Baltimore MD USA
2. National Institute of Health, Symptom Management Branch; National Institute of Nursing, Research; Bethesda MD USA
3. Johns Hopkins Medical Institutions; Baltimore MD USA
4. Skaraborg Hospital; Department of Research and Development Centre; Skövde Sweden
5. Universtiy of Skövde; School of Life Sciences; Skövde Sweden