1 Institute of Emergency for Cardiovascular Diseases 'Professor C.C. Iliescu', Bucharest, Romania; University of Medicine and Pharmacy Carol Davila, Bucharest, Romania. Electronic address: ochioncel@yahoo.co.uk.
2 Department of Cardiology, Kaiser Permanente San Francisco Medical Center, Kaiser Permanente Northern California, San Francisco, CA, USA; Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA.