✦ LIBER ✦
The effect of two lottery-style incentives on response rates to postal questionnaires in a prospective cohort study in preschool children at high risk of asthma: a randomized trial
✍ Scribed by Lonneke B van der Mark,Karina E van Wonderen…
- Book ID
- 126370759
- Publisher
- BioMed Central
- Year
- 2012
- Tongue
- English
- Weight
- 643 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1471-2288
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