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Map of Route 2-A Circuit 2 (Machupicchu Clsico) Ruta 2-B: Ruta Terraza Inferior Circuit 2 (Classic Machupicchu) Route 2-B: Lower Terrace Route is a variant of the classic tour inside the Machu Picchu Historic Sanctuary

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Availability of data and materials The datasets used and/or analyzed during the current study are available as MS Excel files (.xlsx) and RevMan file (.rm5) from the corresponding author upon reasonable request

3 Results 3.1 Study selection The study selection process is illustrated in the PRISMA flow diagram (Figure 1)