Hernandez A M, Forner J V, de la Fuente T, Gonzalez C, Miro R
Paraplegia. 1978 Nov;16(3):272-5. doi: 10.1038/sc.1978.52.
The X-ray examination of 704 spinal cord injured patients have showed that in 20 per cent of the cases para-articular ossifications were present most frequently in the hips. They were less frequently found in non-traumatic and incomplete cases. No other clear relationship was found.