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Serum Bone Turnover Markers: Mean (± SD) fasting morning serum C-telopeptide (CTX; pg/mL; Figure 2A) and serum N-terminal propeptide of procollagen type 1 (PINP; µg/L; Figure 2B) in premenopausal women with PLO, those with IOP (non-PLO), and healthy premenopausal controls. P values are shown for significant between groups comparisons; arrows designate groups compared via t test.
