Applying the Haddon matrix conceptual model to guide motor vehicle crash injury research and prevention in Botswana oleh Claire Bocage, Yohana Mashalla, Paul Motshome, Othusitse Fane, Lydia Masilo-Nkhoma, Olorato Mathiba, Emang Mautle, Botsile Kuiperij, Tlhabano Mmusi, John H. Holmes, Vicky Tam, Frances K. Barg, Douglas J. Wiebe