Authors: Nick Andrews; Annedore Tischer; Annette Siedler; Richard G Pebody; Christopher Barbara; Suzanne Cotter; Arnis Duks; Nina Gacheva; Kriz Bohumir; Kari Johansen; Joel Mossong; Fernando de Ory; Katarina Prosenc; Margareta Sláciková; Heidi Theeten; Marios Zarvou; Adriana Pistol; Kalman Bartha; Dani Cohen; Jo Backhouse; Algirdas Griskevicius Journal: Bull World Health Organ Date: 2008-03 Impact factor: 9.408