Siahanidou T, Garatzioti M, Lazaropoulou C, Kourlaba G, Papassotiriou I, Kino T, Imura A, Nabeshima Y-ichi, Chrousos G. Plasma soluble ?-klotho protein levels in premature and term neonates: correlations with growth and metabolic parameters. Eur J Endocrinol. 2012;167:433-40.