Siglecs: a family of sialic-acid binding lectins. by Crocker, P, Clark, E, Filbin, M, Gordon, S, Jones, Y, Kehrl, J, Kelm, S, Le Douarin, N, Powell, L, Roder, J, Schnaar, R, Sgroi, D, Stamenkovic, K, Schauer, R, Schachner, M, van den Berg, T, Van Der Merwe, P, Watt, S, Varki, A