“…Chronic calcium deprivation may be a contributing factor 26 " 5 Reduced intestinal absorption of calcium, magnesium, and vitamin D 26,69 Increased bone resorption-cytokines dependent (IL-1, IL-6, TNF), glucocorticoids treatment and/or chemotherapy (see Table 4), vitamin D deficiency, intestinal resection, malnutrition, calcium malabsorption 7,26 · 116,117 Altered vitamin D metabolism, reduced physical activity, glucocorticoid treatment and/or chemotherapy (see Table 4), malnutrition, reduced sunlight exposure, hepatotoxins (?) Chronic calcium deprivation may be a contributing factor 26 " 5 Reduced intestinal absorption of calcium, magnesium, and vitamin D 26,69 Increased bone resorption-cytokines dependent (IL-1, IL-6, TNF), glucocorticoids treatment and/or chemotherapy (see Table 4), vitamin D deficiency, intestinal resection, malnutrition, calcium malabsorption 7,26 · 116,117 Altered vitamin D metabolism, reduced physical activity, glucocorticoid treatment and/or chemotherapy (see Table 4), malnutrition, reduced sunlight exposure, hepatotoxins (?)…”