Grand challenges in chronic non-communicable diseases. by Daar, A, Singer, P, Persad, D, Pramming, S, Matthews, DR, Beaglehole, R, Bernstein, A, Borysiewicz, L, Colagiuri, S, Ganguly, N, Glass, R, Finegood, D, Koplan, J, Nabel, E, Sarna, G, Sarrafzadegan, N, Smith, R, Yach, D, Bell, J