1. Bachman, R. The United States of Fitness. Wall Street Journal (26 May; accessed 5 July 2015).
http://online.wsj.com/public/resources/documents/print/WSJ_-D001–20150526.pdf
2. O'Brien, J. Can big data help you get a good night's sleep? Fortune (29 June 2015).
http://fortune.com/2015/06/29/sleep-data/
3. Topol, E.J. Cell 157, 241–253 (2014).
4. Xu, G.J. et al. Science 348, aaa0698 (2015).
5. HHMI. Your viral infection history from a single drop of blood (4 June; accessed 7 July 2015).
http://www.hhmi.org/news/your-viral-infection-history-single-drop-blood