Lawlor, DA; Davey Smith, G; Ebrahim, S; (2004) Commentary: the hormone replacement-coronary heart disease conundrum: is this the death of observational epidemiology? International journal of epidemiology, 33 (3). pp. 464-7. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyh124 Full text not available from this repository.