Quantitative ultrasound is a cheaper but less accurate alternative to the standard technique of measuring this quantity. Drugs used to increase this quantity include alendronate and zoledronate. Age, height, weight, TBS, and this quantity are the main inputs (15[1])of the FRAX tool. Jean Lobstein described a condition (15[1])in which this quantity is low that often results in blue sclerae. Since sex hormones increase this quantity, a decrease in this quantity is a common side effect of (*) puberty blockers and androgen deprivation therapy. (10[2])This quantity is typically measured with DEXA scans. Inability to form type I collagen leads to this quantity being low in a condition partially called ■END■