1 Department of Primary and Community Care (van Weel), Radboud University Medical Center, Nijmegen, The Netherlands; Department of Health Services Research and Policy (van Weel), Australian National University, Acton, Australia; Department of Family and Community Medicine (Kidd), University of Toronto, Toronto, Ont.; Murdoch Childrens Research Institute (Kidd), Melbourne, Australia; Southgate Institute for Health, Equity and Society (Kidd), Flinders University, Adelaide, Australia chris.vanweel@radboudumc.nl.
2 Department of Primary and Community Care (van Weel), Radboud University Medical Center, Nijmegen, The Netherlands; Department of Health Services Research and Policy (van Weel), Australian National University, Acton, Australia; Department of Family and Community Medicine (Kidd), University of Toronto, Toronto, Ont.; Murdoch Childrens Research Institute (Kidd), Melbourne, Australia; Southgate Institute for Health, Equity and Society (Kidd), Flinders University, Adelaide, Australia.