1 Quality of Life, Spirituality and Coping, Institute of Integrative Medicine, Witten/Herdecke University, 58313 Herdecke, Germany ; Freiburg Institute for Advanced Studies (FRIAS), Albert Ludwigs University of Freiburg, 79104 Freiburg, Germany.
2 Freiburg Institute for Advanced Studies (FRIAS), Albert Ludwigs University of Freiburg, 79104 Freiburg, Germany ; Caritas Sciences and Christian Social Work, Faculty of Theology, Albert Ludwigs University Freiburg, 79098 Freiburg, Germany.
3 Freiburg Institute for Advanced Studies (FRIAS), Albert Ludwigs University of Freiburg, 79104 Freiburg, Germany ; Research Unit of Health, Man and Society, Institute of Public Health, Southern Denmark University, 5000 Odense, Denmark ; Palliative Care, Ludwig Maximilian University of Munich, 81377 Munich, Germany.
4 Psychiatry & Behavioral Sciences, Duke University, Durham, NC 27710, USA ; Medicine, King Abdulaziz University, 22254 Jeddah, Saudi Arabia.
5 Medicine and Health Sciences, George Washington Institute for Spirituality & Health, George Washington University School of Medicine & Health Sciences, Washington, DC 20036, USA.
6 Practical Theology & Pastoral Care, School of Divinity, History & Philosophy, King's College University of Aberdeen, Aberdeen AB24 3UB, UK.