Authors: M J Suttorp; J H Kingma; J Vos; E M Koomen; J G Tijssen; F E Vermeulen; C A Ascoop; J M Ernst Journal: Eur Heart J Date: 1992-02 Impact factor: 29.983
Authors: C D Naylor; C D Morgan; C M Levinton; S Wheeler; L Hunter; K Klymciw; R S Baigrie; B S Goldman Journal: CMAJ Date: 1993-10-01 Impact factor: 8.262