1. International comparison of observation-specific spatial buffers: maximizing the ability to estimate physical activity. Issue 1 (December 2017) Authors: Frank, Lawrence; Fox, Eric; Ulmer, Jared; Chapman, James; Kershaw, Suzanne; Sallis, James; Conway, Terry; Cerin, Ester; Cain, Kelli; Adams, Marc; Smith, Graham; Hinckson, Erica; Mavoa, Suzanne; Christiansen, Lars; Hino, Adriano; Lopes, Adalberto; Schipperijn, Jasper Journal: International journal of health geographics Issue: Volume 16:Issue 1(2017) Page Start: 1 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗