1. From New York University School of Medicine, Hospital for Special Surgery, Albert Einstein College of Medicine, and Weill Cornell Medical College, New York, New York; University of Utah Health Sciences Center and Intermountain Healthcare, Salt Lake City, Utah; Oestfold Hospital Trust, Fredrikstad, Norway; University of Toronto, Toronto, Ontario, Canada; Oklahoma Medical Research Foundation and the University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;
2. Johns Hopkins University School of Medicine, Baltimore, Maryland; and University of Illinois at Chicago, Chicago, Illinois.