Gauld R, Burgers J, Dobrow M, Luxford K, Minhas R, Wendt C, Cohen A B
Centre for Health Systems, Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand.
Int J Clin Pract. 2012 Sep;66(9):827-33. doi: 10.1111/j.1742-1241.2012.02989.x.