About the SPECTRA Working Group The OMERACT SPECTRA Working Group is Jasvinder A SinghCo-Chair Vibeke StrandCo-Chair Peter TugwellCo-Chair Working Group Publications Expand The SPECTRA Collaboration OMERACT Special Interest Group: Current Research and Future Directions The SPECTRA Collaboration OMERACT Working Group: Criterion Validity of Joint Space Outcomes with High Resolution peripheral Quantitative Computed Tomography (HR-pQCT)