By Christine Evans m.b., b.s., d.p.m., m.r.c.psych. (Psychiatrist, Psychoanalytic Psychotherapist, Cardiff)
Barbara Bowles Biesecker m.m.s., c.g.c. (Director, JHU/NHGRI Genetic Counseling Graduate Program Associate Investigator, Social and Behavioral Research Branch NIH Bethesda Maryland)
© Cambridge University Press 2006