Autor:	Philipp, Robin, Little, Mark, Sharp, Chris, Kneale, George W., Stewart, Alice M., Sorahan, Tom, Weijin, Zhou, Olsen, Jorn
Zdroj:	Occupational and Environmental Medicine, 1996 Jul 01. 53(7), 502-504.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/27730584 Zobrazit plný text záznamu