Beware using secular trends in deaths to judge effectiveness

Autor:	Brewster, David H, Bhatti, Lesley A, Thomson, Catherine S, Cameron, David A, Dewar, John A
Zdroj:	BMJ: British Medical Journal, 2013 Jul . 347(7916), 23-23.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/23495188 Zobrazit plný text záznamu