Book Review Strictly personal British Medical Journal 1991; 302 doi: https://doi.org/10.1136/bmj.302.6784.1094 (Published 04 May 1991) Cite this as: British Medical Journal 1991;302:1094 Article Related content Metrics Responses Peer review Related articles No related articles found. See more Women are unaware of pregnancy risks linked with sodium valproate BMJ October 31, 2016, 355 i5829; DOI: https://doi.org/10.1136/bmj.i5829 The end of Down’s syndrome? BMJ October 05, 2016, 355 i5344; DOI: https://doi.org/10.1136/bmj.i5344 New gene editing technique CRISPR-Cas9 raises important ethical questions, says advisory body BMJ September 30, 2016, 354 i5318; DOI: https://doi.org/10.1136/bmj.i5318 Testosterone supplementation for “low T” is not supported by evidence, review concludes BMJ September 22, 2016, 354 i5166; DOI: https://doi.org/10.1136/bmj.i5166 Population surveillance for microcephaly BMJ September 13, 2016, 354 i4815; DOI: https://doi.org/10.1136/bmj.i4815