Autor:	Crawford, J. Selwyn, Beynon, Constance L., Lee, Basil, Woinarski, Jillian E., Wright, Jeremy, Garrey, Matthew M.
Zdroj:	British Medical Journal (Clinical Research Edition), 1982 Feb . 284(6315), 594-595.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/29505451 Zobrazit plný text záznamu