Mohammed T. Abou-Saleh

292 PRINCIPLES AND PRACTICE OF GERIATRIC PSYCHIATRY39. Kwok T, Tang C, Woo J et al. Randomised trial of the effectof supplementation on the cognitive function of older peoplewith subnormal cobalamin levels. Int J Geriat Psychiat 1998;13: 611–16.40. American Academy of Neurology Quality Standards Subcommittee.Practice parameter: diagnosis and evaluation of dementia. Neurology1994; 44: 2203–6.41. Organising Committee, Canadian Consensus Conference on the assessmentof dementia. Assessing dementia: the Canadian consensus. CanMed Assoc J 1991; 144: 851–3.42. Royal College of Psychiatrists. Consensus Statement on theAssessment and Investigation of an Elderly Person with SuspectedCognitive Impairment by a Specialist Old Age Psychiatry Service.Council Report CR49. London: Royal College of Psychiatrists, 1995.43. Wallin A, Brun A, Gustafson L. Swedish consensus on dementiadiseases. Acta Neurol Scand 1994; 90(suppl 157): S1–13.44. van Crevel H, van Gool WA, Walstra GJM. Early diagnosis ofdementia: which tests are indicated? What are their costs? J Neurol1999; 246: 73–8.45. Foster GR, Scott DA, Payne S. The use of CT scanning in dementia.Int J Technol Assess Health Care 1999; 15: 406–23.