In the SMA group , 23 patients ( 37 % ) received red blood-cell transfusions , 9 patients ( 15 % ) fresh frozen plasma , and 3 patients ( 5 % ) received platelets ( control : n = 27 [ 46 % ] , p = 0.44 ; n = 10 [ 17 % ] , p = 0.91 ; and n = 4 [ 7 % ] , p = 0.71 , respectively ) .
