Publication PMID: 20007571Welner RS, Esplin BL, Garrett KP, Pelayo R, Luche H, Fehling HJ, Kincade PW. Asynchronous RAG-1 expression during B lymphopoiesis. J Immunol 183:7768-77, 2009 December, PMID: 20007571, PMCID: PMC2796202