1 Care in Long Term Conditions, King's College London, London, UK; CIBER Epidemiology and Public Health (CIBERESP), Madrid, Spain; Institute of Biomedicine (IBIOMED), Universidad de León, León, Spain. Electronic address: [email protected].
2 Health Services Research Group, Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain; Dept. of Medical and Life Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiology and Public Health (CIBERESP), Madrid, Spain.
3 Department of Medicine, National University of Singapore, Singapore, Singapore; Department of Family Medicine, National University Health System, Singapore Singapore; Centre for Research in Health Systems Performance (CRiHSP) National University Health System, Singapore, Singapore.