A new glycosylation deficiency syndrome by Wild, M, Denecke, J, Straeter, R, Stoelting, T, Schunicht, Y, Zeuschner, D, Klumperman, J, Lefeber, D, Spelten, O, Zarbock, A, Kelm, S, Strenge, K, Haslam, S, Luehn, K, Stahl, D, Gentile, L, Schreiter, T, Hilgard, P, Beck-Sickinger, A, Marquardt, T