Different data collection methods can lead to different findings (letter to the editor)

MA Bruijnzeels

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@article{b620246c44df4bf2a1cd2bd79afb014e,

title = "Different data collection methods can lead to different findings (letter to the editor)",

author = "MA Bruijnzeels",

year = "1999",

language = "Undefined/Unknown",

volume = "318",

pages = "876--876",

journal = "British Medical Journal",

issn = "0959-535X",

publisher = "BMJ Publishing Group",

}