Type IIB mutation His-505→Asp implicates a new segment in the control of von Willebrand factor binding to platelet glycoprotein Ib - Rabinowitz,I.; Randi,A.M.; Shindler,K.S.; Tuley,E.A.; Rustagi,P.K.; Sadler,J.E. (J Biol Chem, 1993)