Green space at school and attention in primary school children in Belgium: A stratified matched case-control study

Raf Aerts; Hans Van Calster; Melike Ozen; Rafiqa Benchrih; Sophie Heyman; Edith Swerts; Arlien Wuyts; Liesa Lammens; Els Lommelen; Michael Leone; Saskia Wanner; Harmony Brulein; Antoine Groslambert; Linda Vanmeersche; Marie Legein; Wenke Smets; Irina Spacova; Eva M. De Clercq; Sarah Lebeer; Anna Leonard; Sophie O. Vanwambeke; Hans Keune