Autor:	van Teijlingen, Edwin, Porter, Mike, Bury, Judy, Sherval, Jim, Preston, Andrew, Campion-Smith, Charles, Lester, Helen, Bradley, Colin, Mason, Jane R.
Zdroj:	BMJ: British Medical Journal, 1997 Sep 01. 315(7108), 601-602.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/25175620 Zobrazit plný text záznamu