D. L Murray, E Ryu, M. R Snyder and J. A. Katzmann
Clinical Chemistry 55 ( 8 ): 1523 - 1529 , 2009
T. K Khoo, S. S Vege, H. S Abu Lebdeh, E Ryu, S Nadeem and R. A. Wermers
Journal of Clinical Endocrinology & Metabolism 94 ( 6 ): 2115 - 2118 , 2009