TY - GEN AU - Grech,P AU - Cunningham,D A AU - Witherow,R O TI - Re: Duplex scanning in suspected vasculogenic impotence: a worthwhile exercise? SN - 0007-1331 PY - 1989///1222 KW - Erectile Dysfunction KW - diagnosis KW - Humans KW - Male KW - Ultrasonography N1 - Publication Type: Comment; Letter ER -