Ashmeade , T., L. Pereda , M. Chen , et al. "Longitudinal Measurements of Bone Status in Preterm Infants" Journal of Pediatric Endocrinology and Metabolism, 20.3 (2011): 415-424. Retrieved 19 Jun. 2013, from doi:10.1515/JPEM.2007.20.3.415

Ashmeade , T., Pereda , L., Chen , M., et al. (2011). Longitudinal Measurements of Bone Status in Preterm Infants. Journal of Pediatric Endocrinology and Metabolism, 20(3), pp. 357-455. Retrieved 19 Jun. 2013, from doi:10.1515/JPEM.2007.20.3.415

Ashmeade , T., L. Pereda , M. Chen , et al. 2011. Longitudinal Measurements of Bone Status in Preterm Infants. Journal of Pediatric Endocrinology and Metabolism. 20(3): 357-455. Retrieved 19 Jun. 2013, from doi:10.1515/JPEM.2007.20.3.415