[Summary of the Dutch College of General Practitioners' (NHG) practice guideline 'ADHD in children'].

The diagnosis of ADHD may be considered if a child is hyperactive, impulsive or inattentive, and if this behaviour results in evidently impaired functioning in multiple settings. Children with behavioural problems and slightly impaired functioning may benefit from patient information, education and parenting advice. From the age of 6 years, children can be offered diagnostic testing and professional support within the primary care setting, provided sufficient knowledge and expertise is available and there is collaboration with other health care providers.

[Evidence-based surgery].

Authority-based surgery is slowly being replaced by evidence-based surgery. New and existing interventions are increasingly being studied in randomised controlled trials (RCTs). RCTs allow not only for comparison of different types of surgical interventions but also for comparison with non-surgical interventions and adjuvant therapies.

[From the Cochrane Library: the use of peer review is still under discussion].

Peer review is generally considered to be an invaluable part of the editorial process of biomedical journals. It is widely assumed that peer review has positive effects on the quality of submitted papers and of biomedical research. This is why improvements in peer reviewing have been studied for some years.