Statistical analysis plan for the control of blood pressure and risk attenuation-rural Bangladesh, Pakistan, Sri Lanka (COBRA-BPS) trial: a cluster randomized trial for a multicomp... oleh Mihir Gandhi, Pryseley Nkouibert Assam, Elizabeth L. Turner, Donald E. Morisky, Edwin Chan, Tazeen H. Jafar, on behalf of the COBRA-BPS Study Group