beryllium rickets

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• Calcium — (pronEng|ˈkælsiəm) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078. Calcium is a soft grey alkaline earth metal, and is the fifth most abundant element by mass in the Earth s crust. Calcium is also …   Wikipedia

• Osteopetrosis — (Malignant) Classification and external resources X ray of the pelvis of a patient with osteopetrosis, adult onset form (Albers Schonberg disease). Note the dense bones. ICD …   Wikipedia