Effectiveness of intermittent pulsatile elastic stockings for the prevention of calf and thigh vein thrombosis in patients undergoing elective knee surgery - Hull, R; Delmore, T J; Hirsh, J; Gent, M; Armstrong, P; Lofthouse, R; MacMillan, A; Blackstone, I; Reed-Davis, R; Detwiller, R C (Thromb Res, 1979)