Risks and Benefits of Green Spaces for Children: A Cross-Sectional Study of Associations with Sedentary Behavior, Obesity, Asthma, and Allergy. - Dadvand, Payam; Villanueva, Cristina M.; Font-Ribera, Laia; Martinez, David; Basagaña, Xavier; Belmonte, Jordina; Vrijheid, Martine; Gražulevičiene, Regina; Kogevinas, Manolis; Nieuwenhuijsen, Mark J. (Environmental Health Perspectives, 2014)