[1] Leiden Univ, Dept Pathol, Med Ctr, NL-2300 RC Leiden, Netherlands
[2] Univ Navarra, Dept Pathol, E-31080 Pamplona, Spain
[3] Leiden Univ, Dept Radiol, Med Ctr, NL-2300 RC Leiden, Netherlands
[4] Leiden Univ, Dept Stat, Med Ctr, NL-2300 RC Leiden, Netherlands
[5] Treviso Reg Hosp, Dept Pathol, I-31100 Treviso, Italy
[6] Univ Miami Hosp, Dept Pathol, Miami, FL USA
[7] Univ Iowa, Dept Pathol, Carver Coll Med, Iowa City, IA 52242 USA
[8] Med Univ Graz, Inst Pathol, Graz, Austria
[9] Mayo Clin, Dept Lab Med & Pathol, Rochester, MN USA
[10] Univ Hosp Leuven, Dept Pathol, Louvain, Belgium
[11] Johns Hopkins Univ Hosp, Dept Pathol & Orthopaed Surg, Baltimore, MD 21287 USA
[12] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[13] Univ Oxford, Nuffield Orthopaed Ctr, Nuffield Dept Orthopaed Rheumatol & Musculoskelet, Oxford, England
[14] Univ Utah, Dept Orthopaed Surg, Ctr Childrens Canc Res, Huntsman Canc Inst,Primary Childrens Med Ctr, Salt Lake City, UT USA