[1] Univ Toronto, Dept Med, Ctr Excellence Skeletal Hlth Assessment, Toronto, ON, Canada
[2] Univ Toronto, Univ Hlth Network, Joint Dept Med Imaging, Toronto, ON, Canada
[3] St Josephs Healthcare McMaster Univ, Michael G DeGroote Sch Med, Dept Med, Hamilton, ON, Canada
[4] Univ Calgary, Dept Med, Calgary, AB T2N 4Z6, Canada
[5] Univ British Columbia, Dept Med, Vancouver, BC, Canada
[6] Univ Victoria, Victoria, BC, Canada
[7] Univ Toronto, Dept Med, Toronto, ON, Canada
[8] Univ Laval, Dept Med, Quebec City, PQ G1K 7P4, Canada
[9] Univ Montreal, Dept Med, Montreal, PQ H3C 3J7, Canada
[10] McGill Univ, Dept Med, Montreal, PQ, Canada
[11] Univ Hlth Network, Osteoporosis & Womens Hlth Programs, Toronto, ON, Canada
[12] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, Musculoskeletal Quantitat Imaging Res Grp, San Francisco, CA 94143 USA
[13] Univ Calgary, McCaig Inst Bone & Joint Hlth, Dept Radiol, Calgary, AB T2N 4Z6, Canada