Senior Lecturer, Department of Psychological Medicine, University of Otago, Christchurch, New Zealand, and; Clinical Psychologist, Canterbury District Health Board, Christchurch, New Zealand. Senior Lecturer and Clinical Psychologist, Psychology Department, University of Canterbury, New Zealand. Distinguished Professor, Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA, and; Professor, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, and; Professor, Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.