1. Ferguson-Smith MA, Yates JRW (1984) Maternal age specific rates for chromosome aberrations and factors influencing them: report of a collaborative European study on 52,965 amniocenteses. Prenat Diagn 4:5?44
2. Hook EB (1978) Differences between rates of trisomy 21 (Down's syndrome) and other chromosomal abnormalities diagnosed in livebirth and in cells cultured after 2nd trimester amniocentesis ?suggested explanations and implications for genetic counseling and program planning. In: Summitt RL, Bergsma D (eds) Sex differentiation and chromosomal abnormalities. Liss, New York, pp 249?267
3. Hook EB (1981) Interchange trisomic Down's syndrome and Patau's syndrome: general approaches to estimating mutation rates and epidemiological advantages for monitoring. In: Hook EB, Porter IH (eds) Population and biological aspects of human mutation. Academic Press, New York London, pp 167?190
4. Hook EB (1982) The epidemiology of Down syndrome. In: Pueschel SM (ed) Down syndrome: advances in biomedicine and the behavioral sciences. Ware Press, Cambridge, Mass, pp 11?88
5. Hook EB (1983) Chromosome abnormalities and spontaneous fetal deaths following amniocentesis: further data and associations with maternal age. Am J Hum Genet 35:110?116