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Table 1 Number of salivary samples collected during the study. The number of samples collected during each step of the study was reported for each crewmember. Marginal totals were added for subjects and simulated journeys together with the grand total that was reported in the bottom right corner of the table

From: Defining the resilience of the human salivary microbiota by a 520-day longitudinal study in a confined environment: the Mars500 mission

Subject Earth to Mars (first variant) Mars to Earth (third variant) Follow-up (normal diet) Total
5001 7 5 3 15
5002 7 5 3 15
5003 7 5 3 15
5004 7 5 3 15
5005 7 5 2 14
5006 7 5 2 14
Total 42 30 16 88