Gustavo Nigenda , Ana Langer , Chusri Kuchaisit , Mariana Romero , Georgina Rojas , Muneera Al-Osimy , José Villar , Jo Garcia , Yagob Al-Mazrou , Hassan Ba'aqeel , Guillermo Carroli , Ubaldo Farnot , Pisake Lumbiganon , José Belizán , Per Bergsjo , Leiv Bakketeig and Gunilla Lindmark
BMC Public Health 2003, 3:17doi:10.1186/1471-2458-3-17