“Respiratory and cardiovascular responses to walking down a traffic-polluted road compared with walking in a traffic-free area in participants aged 60 years and older with chronic lung or heart disease and age-matched healthy controls: a randomised, crossover study,” by Rudy Sinharay, Jicheng Gong, Benjamin Barratt, Pamela Ohman-Strickland, Sabine Ernst, Prof. Frank J. Kelly, Prof. Junfeng (Jim) Zhang, Prof. Peter Collins, Prof. Paul Cullinan, and Prof. Kian Fan Chung (Vol. 391, No. 10118, January 27, 2018, p. 339-349).
www.thelancet.com/journals/lancet/article/PIIS0140-6736(17)32643-0/abstract
