1. Hamilton Health Sciences-General Hospital, 237 Barton Street East, 7 North Wing, Suite 727, Hamilton, Ontario, Canada L8L 2X2.
2. St. John’s Health Center, Orthopedic Centre, 1328 Twenty Second Street, Santa Monica, California 90404, USA.
3. UC-Davis Lawrence J. Ellison Ambulatory Care Center, 4860 Y Street, Sacramento, California 95817, USA.
4. MeritCare Southpointe, 2400 32nd Avenue South, Fargo, North Dakota 58103, USA.