Authors: J Chiu; J Nussbaum; S Bozzette; J G Tilles; L S Young; J Leedom; P N Heseltine; J A McCutchan Journal: Ann Intern Med Date: 1990-09-01 Impact factor: 25.391
Authors: P Nunn; D Kibuga; S Gathua; R Brindle; A Imalingat; K Wasunna; S Lucas; C Gilks; M Omwega; J Were Journal: Lancet Date: 1991-03-16 Impact factor: 79.321