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BACKGROUND Osteogenesis imperfecta (OI) is a congenital disorder characterized by increased bone fragility and low bone mass. METHODS The presence of COL1A1 or COL1A2 mutation was investigated by direct sequencing in 72 patients with OI type I, III, or IV (27 males and 45 females; age range 0.2-62 years) from 37 unrelated families. The clinical features(More)
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