[1] Icahn Sch Med Mt Sinai, Internal Med, New York, NY 10029 USA
[2] Dow Med Coll, Internal Med, Karachi, Pakistan
[3] Jinnah Med & Dent Coll, Internal Med, Karachi, Pakistan
[4] Abington Hosp Jefferson Hlth, Internal Med, Abington, PA USA
[5] Univ New Mexico, Hlth Sci Ctr, Cardiovasc Dis, Albuquerque, NM 87131 USA