1. Department of Internal Medicine, Cleveland Clinic Florida, Weston, FL 33331, USA
2. Department of Cardiology, Cleveland Clinic Florida, 2950 Cleveland Clinic Blvd, Weston, FL 33331, USA
3. Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
4. Quantitative Research Division, BioEstadistica, S.C., Monterrey, NL 66260, Mexico