Factors influencing dietary inequalities among adolescents in Madrid and Bilbao: a qualitative research project Jesús Rivera-Navarro; Ignacio de Loyola González-Salgado; Guadalupe Ramos-Truchero; Leyre Gravina; Julia Díez; Silvia Caballero; Manuel Franco;

Photovoice versus focus groups: a comparative study of qualitative health research techniques Paloma Conde; Jesús Rivera-Navarro; Marta Gutiérrez-Sastre; Ignacio González-Salgado; Manuel Franco; María Sandín Vázquez;