Elie G Dib1
, Michael R Kidd2
and Deborah C Saltman3 
1
Sanford Cancer Center, University of South Dakota, 1020 West 18th Street, Sioux Falls, SD 57104, USA
2
Discipline of General Practice, The University of Sydney, 37A Booth Street, Balmain, Sydney, NSW 2041, Australia
3
Institute of Postgraduate Medicine, Brighton and Sussex Medical School, Mayfield House, University of Brighton, Falmer, Brighton BN1 9PH, UK