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A high response is not essential to prevent selection bias: Results from the Leiden 85-plus study
A.Bootsma-van der Wiel, E van Exel, A.J.M de Craen, J Gussekloo, A.M Lagaay, D.L Knook, R.G.J WestendorpVolume:
55
Year:
2002
Language:
english
DOI:
10.1016/s0895-4356(02)00505-x
File:
PDF, 157 KB
english, 2002