Urolog - Provides urological information for urologists, general practitioners and non-professionals. Performance Anxiety and Impotence - An explanation of sexual performance anxiety in men and impotence. Impotence - Myths and Facts - Questions and answers and personal experiences of writers, Terry and Hilary Phillips. National Kidney and Urologic Diseases Information Clearinghouse: Erectile Dysfunction - Fact sheet including illustrated information on the physiology of erection, causes of impotence, diagnosis, treatment and anticipated future treatment developments. Sexual Dysfunction - Indian physician Dr. Sudhakar Krishnamurti provides information on a variety of sexual dysfunctions; site offers free consultation by email. Postgraduate Medicine: Erectile Function and Dysfunction - Article details how an erection takes place and what can be done when it doesn't.