Li W, Zou T, Li L, Deng Y, Sun VT, Zhang Q, Layton B, Setoguchi S. Impacts of the North Atlantic subtropical high on interannual variation of summertime heat stress over the conterminous United States. Clim Dyn. 2019 Sep;53(5-6):3345-59. doi: 10.1007/s00382-019-04708-1
Bourne JE, Sauchelli S, Perry R, Page A, Leary S, England C, Cooper AR. Health benefits of electrically-assisted cycling: a systematic review. Int J Behav Nutr Phy. 2018 Nov 21;15(1):116. doi: 10.1186/s12966-018-0751-8
Fondell E, Lagerros YT, Sundberg CJ, Lekander M, Balter O, Rothman KJ, Balter K. Physical activity, stress, and self-reported upper respiratory tract infection. Med Sci Sports Exerc. 2011 Feb 1;43(2):272-9.