A. M. Lagaay, J. C. van der Meij, W. Hijmans
Lagaay A M, van der Meij J C, Hijmans W.
Validation of medical history taking as part of a population based survey in subjects aged 85 and over.
British Medical Journal 1992; 304 :1091
doi:10.1136/bmj.304.6834.1091