Hendriek C Boshuizen, Gerbrand J Izaks, Stef van Buuren, Gerard J Ligthart
Boshuizen H C, Izaks G J, van Buuren S, Ligthart G J.
Blood pressure and mortality in elderly people aged 85 and older: community based study
BMJ 1998; 316 :1780
doi:10.1136/bmj.316.7147.1780