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Table 3 Sequence of search expressions used in Medline (1976-April 2000) as the search strategy

From: Preventing infection from reusable medical equipment: a systematic review

No. Search Expression
1 exp disinfectants/
2 exp hypochlorite/ or bleach.tw
3 exp formaldehyde/
4 exp glutaraldehyde/
5 exp hydrogen peroxide/
6 exp alcohols/
7 exp povidone iodine/
8 or/2–7
9 exp sterilization/
10 9 and (steam or heat or boil$).tw
11 (1 and 8) or 9 or 10
12 exp histocytological preparation techniques/
13 exp handwashing/
14 exp sanitary engineering/
15 11 not (12 or 13 or 14)
16 exp bacillaceae/
17 exp mycobacterium/ or mycobacterium.tw
18 exp pseudomonas/ or pseudomonas.tw
19 exp staphylococcus/ or staphylococcus.tw
20 exp enterobacteriaceae/
21 exp fungi/
22 exp hiv/ or hiv.tw
23 exp hepatitis viruses/ or hepatitis.tw
24 exp picornaviridae/
25 exp herpesviridae/ or herpes.tw
26 exp creutzfeldt-jakob syndrome/ or creutzfeldt-jakob syndrome.tw
27 exp cryptosporidium/ or cryptosporidium.tw
28 or/16–27
29 15 and 28