Citation:
D.A. Kim, A.R. Hwong, D. Stafford, D.A. Hughes, A.J. O’Malley, J.H. Fowler, and N.A. Christakis, "Social network targeting to maximise population behaviour change: a cluster randomised controlled trial" The Lancet, Published online May 5, 2015 http://dx.doi.org/10.1016/S0140-6736(15)60095-2