1 Subjects: “...food surveys...”

2 Subjects: “...literature survey...”

3 Subjects: “...survey...”

4 Subjects: “...public survey...”

5 Subjects: “...survey...”

6 Subjects: “...cross-sectional survey...”

7 Subjects: “...a survey...”

8 Subjects: “...consumer survey...”

9 Subjects: “...cross-sectional survey...”

10 Subjects: “...online survey...”

11 Subjects: “...nationwide survey...”

12 Subjects: “...questionnaire survey...”

13 Subjects: “...student survey...”

14 Subjects: “...vegetation survey...”

15 Subjects: “...survey...”

16 Subjects: “...survey...”

17 Subjects: “...population survey...”

18 “... not been defined. There is a need to survey legionellae in water systems to prevent legionellosis. Although...”

19 “... carried out in both field and laboratory surveys, with modelling studies also being conducted, and a wide...”