1. Fitbit®: An accurate and reliable device for wireless physical activity tracking. (15th April 2015) Authors: Diaz, Keith M.; Krupka, David J.; Chang, Melinda J.; Peacock, James; Ma, Yao; Goldsmith, Jeff; Schwartz, Joseph E.; Davidson, Karina W. Journal: International journal of cardiology Issue: Volume 185(2015) Page Start: 138 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗