Regulating the local availability of tobacco retailing in Madrid, Spain: a GIS study to evaluate compliance
Roberto Valiente, Xisca Sureda, Usama Bilal, Ana Navas-Acien, Jamie Pearce, Manuel Franco, Francisco Escobar
Tobacco Control May 2019, 28 (3) 325-333; DOI: 10.1136/tobaccocontrol-2018-054269