“For this study, the researchers recruited 24 participants between the ages of 18 and 34.” Only 24 people. Do we also know the geographic breakdown of the part

“For this study, the researchers recruited 24 participants between the ages of 18 and 34.” Only 24 people. Do we also know the geographic breakdown of the participants? I would be interested in seeing how African, Indian, and other groups who live in high heat regions adapt.