1. Department of Adult Cardiology (K.A.K., N.Q., T.S., J.A.S., D.K., R.K., D.Q., U.Y., J.J.), National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.
2. Department of Clinical Research (M.K.), National Institute of Cardiovascular Diseases (NICVD), Karachi, Pakistan.