[1] Med Univ Warsaw, Crit Care, Warsaw, Poland
[2] St Georges Univ, Sch Med, St Georges, Grenada
[3] Harvard Med Sch, Cardiac Arrhythmia Serv, Internal Med, Boston, MA USA
[4] San Martin Porres Univ, Sch Med, Internal Med, Lima, Peru
[5] St Georges Univ, Sch Med, Internal Med, St Georges, Grenada
[6] Guru Gobind Singh Govt Hosp, Internal Med, New Delhi, India
[7] Internal Med, Medstar Hlth, Baltimore, MD USA
[8] Univ Lahore, Allied Hlth Sci, Gujrat Campus, Gujrat, Pakistan