Effect of questionnaire length, personalisation and reminder type on response rate to a complex postal survey: randomised controlled trial
Sahlqvist, Shannon ; Song, Yena ; Bull, Fiona ; Adams, Emma ; Preston, John ; Ogilvie, David
BMC medical research methodology, 2011-05, Vol.11 (1), p.62-62, Article 62 [Periódico revisado por pares]England: BioMed Central Ltd
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