Autor:	Ruta, Danny, Garratt, Andrew, Abdalla, Mona, Buckingham, Ken, Russell, Ian, Jenkinson, Crispin, Wright, Lucie, Coulter, Angela, Hill, Sara, Harries, Ursula, Popay, Jennie, Lyons, Ronan A., Fielder, Hilary, Littlepage, Beverley N. C.
Zdroj:	BMJ: British Medical Journal, 1993 Aug . 307(6901), 448-449.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/29720748 Zobrazit plný text záznamu