"Cannot detect a change" is not the same as "there is not a change".
McGuckin
Maryanne
M
Waterman
Richard
R
D000438:Alcohols; D000891:Anti-Infective Agents, Local / Q000008:administration & dosage*; D001419:Bacteria / Q000187:drug effects; D001424:Bacterial Infections / Q000453:epidemiology / Q000382:microbiology / Q000517:prevention & control; D003428:Cross Infection / Q000453:epidemiology* / Q000382:microbiology / Q000517:prevention & control*; D003627:Data Interpretation, Statistical; D005782:Gels / Q000008:administration & dosage; D006235:Hand Disinfection / Q000379:methods*; D006801:Humans
D000438:Alcohols; D000891:Anti-Infective Agents, Local; D005782:Gels