[Levitra in a hardness test].
Sommer
Frank
F
Klinik und Poliklinik für Urologie der Universität zu Köln, Postfach 41 1043, 50870 Köln. Frank.Sommer@uni-koeln.de
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D007093:Imidazoles; D010879:Piperazines; D013450:Sulfones; D014227:Triazines; D000069058:Vardenafil Dihydrochloride