1 Health Care Governance, Erasmus School of Health Policy and Management, Erasmus University, 3000 DR Rotterdam, Netherlands; Optentia Research Unit, North-West University, Vanderbijlpark, South Africa. Electronic address: pot@eshpm.eur.nl.
2 Faculty of Nursing, Universidad Andrés Bello, Santiago, Chile; Millennium Institute for Care Research, Santiago, Chile.
3 Optentia Research Unit, North-West University, Vanderbijlpark, South Africa.