Interim report of a study on gastroeteritis in sentinel practices in the Netherlands (NIVEL) 1996-1999 : results of the first two years / M.A.S. de Wit ... [et al.]

Interim report of a study on gastroeteritis in sentinel practices in the Netherlands (NIVEL) 1996-1999 : results of the first two years / M.A.S. de Wit ... [et al.]