Patel, RR; Steer, P; Doyle, P; Little, MP; Elliott, P; (2004) Does gestation vary by ethnic group? A London-based study of over 122000 pregnancies with spontaneous onset of labour. International journal of epidemiology, 33 (1). p. 107. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyg238 Full text not available from this repository.