Authors: R Steffen; R Heusser; R Mächler; R Bruppacher; U Naef; D Chen; A M Hofmann; B Somaini Journal: Bull World Health Organ Date: 1990 Impact factor: 9.408
Authors: H O Lobel; P A Phillips-Howard; A D Brandling-Bennett; R Steffen; C C Campbell; A Y Huong; J B Were; R Moser Journal: Bull World Health Organ Date: 1990 Impact factor: 9.408