[1] Safra Childrens Hosp, Sheba Med Ctr, Dept Neonatol, IL-52621 Tel Hashomer, Israel
[2] Chaim Sheba Med Ctr, Thrombosis Unit, IL-52621 Tel Hashomer, Israel
[3] Chaim Sheba Med Ctr, Israeli Natl Hemophilia Ctr, IL-52621 Tel Hashomer, Israel
[4] Tel Aviv Univ, Sackler Fac Med, Ramat Aviv, Israel