A picture of the child's knee cap X-Ray. (IMAGE) Estonian Research Council Caption A picture of the child's knee cap X-Ray. Credit S. Inskip, Leicester University. Usage Restrictions Use with credits. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.