1. Chaim Sheba Medical Center, Tel Hashomer, Israel; Tel Aviv University, Tel Aviv, Israel;
2. Statistical Consult, Victoria, British Columbia, Canada;
3. National University Singapore, Singapore;
4. University of Munich, Munich, Germany;
5. Toronto General Hospital, Toronto, Ontario, Canada; University of Toronto, Toronto;
6. University of Melbourne, Parkville, Victoria, Australia; Royal Melbourne Hospital, Parkville;
7. University of Alabama at Birmingham, Birmingham, Alabama, USA