Weinstein, M., Gross-Tsur, V., Leitner, Y., Berger, I., Marom, R., Geva, R., Uliel, S., Myers, V., Artzi, M., Ben Bashat, D and Ben Sira, L., 2014 Isolated mild white matter signal changes in preterm infants: A regional approach for comparison of cranial ultrasound and MRI findings.