Illness in Travelers Returned From Brazil: The GeoSentinel Experience and Implications for the 2014 FIFA World Cup and the 2016 Summer Olympics - Wilson, Mary E.; Chen, Lin H.; Han, Pauline V.; Keystone, Jay S.; Cramer, Jakob P.; Segurado, Aluisio; Hale, DeVon; Jensenius, Mogens; Schwartz, Eli; Sonnenburg, Frank von; Leder, Karin (Clinical Infectious Diseases, 2014)