Flow chart of in- and excluded admissions in the medical record research.
MR = medical record.
* The included admissions concerned 296 individual patients (some patients were registered more than once)
** Not included because it was not possible to inform these patients (or their relatives)
*** Included at first but excluded during the study because there was no mention in MR of a varicella episode (or only mention of a suspicion that was withdrawn after further investigation).