Boer, R.F. de

gastroenteriti children study hospital netherland rotaviru hospitalization pathogen infection microbiol adult incidence sample control visit group patient health disease duynhoven risk factors admission episode virus diarrhea kortbeek lm geops study factor symptom number noroviru cryptosporidium table result koopmans mp parasite koopman 5 years vaccination adenoviru absence etiology method questionnaire salmonella period month kortbeek child estimate cause epidemiol discharge inclusion health care costs stool transport rotavirus vaccination difference burden productivity losses vennema h giardia lamblia dutch wannet wj homini fragili selenite enrichment broth van duynhoven yt range giardia detection campylobacter 2 years model person department van pelt rotavirus infection nmr data