Autor:	Wolfe, Ingrid, Cass, Hilary, Thompson, Matthew J, Craft, Alan, Peile, Ed, Wiegersma, Pieter A, Janson, Staffan, Chambers, T L, McKee, Martin
Zdroj:	BMJ: British Medical Journal, 2011 Apr . 342(7803), 901-904.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41150307 Zobrazit plný text záznamu