By Geijer Roeland MM   Sachs Alfred PE   Verheij Theo JM   Kerstjens Huib AM   Kuyvenhoven Marijke M   Hoes Arno W   in British Journal of General Practice

ISSN:1478-5242|57|539|477-482

Royal College of General Practitioners‎(2007)‎

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By Struik Fransien M   Duiverman Marieke L   Meijer Petra M   Nieuwenhuis Jellie A   Kerstjens Huib AM   Wijkstra Peter J   in Respiratory Care

ISSN:0020-1324|56|10|1522-1525

The Journal Respiratory Care Company‎(2011)‎

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