Random and systematic errors in case-control studies calculating the injury risk of driving under the influence of psychoactive substances

Sjoerd Houwing, Marjan Hagenzieker, René Mathijssen, Sara-Ann Legrand, Alain G. Verstrate, Tove Hels, Inger Marie Bernhoft, Kirsten Wiese Simonsen, Pirjo Lillsunde, Donata Favretto, Santo D. Ferrara, Marija Caplinskiene, Kris L.L. Molvig, Karel A. Brookhuis