Estimating physical activity using a cell phone questionnaire sent by means of short message service (SMS): a randomized population-based study

Autor:	Lagerros, Ylva Trolle, Sandin, Sven, Bexelius, Christin, Litton, Jan-Eric, Löf, Marie
Zdroj:	European Journal of Epidemiology, 2012 Jan 01. 27(7), 561-566.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/23254679 Zobrazit plný text záznamu Full text from SpringerLink