Uil, J.J.

gastroenteriti study hospital adult netherland hospitalization visit children geops study health rotaviru group absence estimate health care costs transport admission episode incidence duynhoven burden productivity losses kortbeek lm disease microbiol vaccination nmr data age groups patient method koopmans mp costs nmra productivity outpatient vaccine registry practitioner koopman kortbeek friesema table number health care services herd immunity effect 10- year period van duynhoven ythp questionnaire friction cost method health care facilities cohort study death clinic weekend cohort medication child community estimation etiology 5–17 resource difference period treatment epidemiol inhabitant ambulance rotavirus gastroenteritis discharge virus price cost-effectiveness study hospital-based study costs geops vennema h follow-up health care boer rf communitybased study duizer e