Ilera-Aiye: A virtual world for the development of serious games for health education and promotion in the Northeastern Brazilian countryside. - Cecilia Cordeiro da Silva; Barbara Gabrielle M. de Alcantara; Julio Cesar S. Olimpio; Cristine Martins Gomes de Gusmão; Abel G. da Silva Filho; Wellington P. dos Santos (SeGAH, 2014)