Figure 3.
PRISMA flow diagrams: (a) Visual EF; (b) Acoustic EF; (c) Thermal EF; (d) Air Quality EF. The number of sections refers to query structure (Figure 2).
PRISMA flow diagrams: (a) Visual EF; (b) Acoustic EF; (c) Thermal EF; (d) Air Quality EF. The number of sections refers to query structure (Figure 2).