Effect of tolvaptan on acute heart failure with hyponatremia – A randomized, double blind, controlled clinical trial oleh Elangovan Shanmugam, C.R. Madhu Prabhu Doss, Melvin George, Amrita Jena, Muthukumar Rajaram, Balaji Ramaraj, Karthik Anjaneyan, B. Kanagesh