Randomised trial of old and new antihypertensive drugs in elderly patients: cardiovascular mortality and morbidity the Swedish Trial in Old Patients with Hypertension-2 study. - Hansson,L.; Lindholm,L.H.; Ekbom,T.; Dahlof,B.; Lanke,J.; Schersten,B.; Wester,P.O.; Hedner,T.; de Faire,U. (Lancet, 1999)