Autor:	England, D. W., Hopkins, Liz, Spigelman, Allan D., Ackroyd, Roger, Reed, Malcolm W. R., Bundred, Nigel J., Baildam, Andrew D., Barr, Lester, Maguire, Peter, Reynolds, Jill, Thomson, Lesley, Grimshaw, Jill, Morris, Julie
Zdroj:	BMJ: British Medical Journal, 1999 May 01. 318(7192), 1210-1211.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/25184509 Zobrazit plný text záznamu