United States medical and mental health professionals follow the Diagnostic and Statistical Manual of Mental Disorders (DSM) of the American Psychiatric Association; the International Classification of Diseases (ICD) published by the World Health Organisation (WHO) is often used by health professionals elsewhere. Periodic updates incorporate changes in knowledge and treatments. For example, under DSM-IV (published in 1994, with corrections and minor changes in 2000), the diagnostic criteria for ADHD in adults broadly follow the same as in children, but the proposed revision for the DSM-5 differentiates the presentation of ADHD for children and adults for several symptoms.