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Table 1 Tested filter types, operating time and test intervals (trial 1–4)

From: Hygienic safety of reusable tap water filters (Germlyser®) with an operating time of 4 or 8 weeks in a haematological oncology transplantation unit

Filter type/trial sample sets (n samples) Operating time of filter (weeks) Additional test intervals during operating time (weeks)
1/1 3 × 6 (18)* 1 0
1/2 13 × 6 (78)* 1 0
2/3 12 × 18 (216) 4 1
3/4 3 × 18 (54) 8 1, 4
  1. * without showers