Int. j. environ. res. public health Int. j. environ. res. public health Centre for the Promotion of Physical Activity and Health (CAPAS-City) : a Pyrenean cross-cultural structure to lead the way in the design, implementation, and evaluation of multilevel physical activity interventions Zaragoza Casterad Javier Universidad de Zaragoza Sevil-Serrano Javier Universidad de Zaragoza Bois Julien E. Generelo Eduardo Universidad de Zaragoza Lhuisset Léna Aibar-Solana Alberto Universidad de Zaragoza 2019 research-article