Autor:	O'Rourke, Noelle, Barrett, Ann, Jones, Richard, Featherstone, Carrie, Hughes, Vivienne, Jeffrey, David, Ball, Tom, McCague, Kitty
Zdroj:	BMJ: British Medical Journal, 2001 Apr . 322(7293), 1062-1063.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/25466892 Zobrazit plný text záznamu