Abstract
Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London WC1E 7HT.
Publication Types:
Review
Review, Tutorial
Publication Types:
Review
Review, Tutorial
Original language | English |
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Pages (from-to) | 1682-1685 |
Number of pages | 4 |
Journal | BMJ |
Volume | 318 |
Issue number | 7199 |
DOIs | |
Publication status | Published - 1 Jan 1999 |