> Most of the relevant data available in the literature were not stratified by sex and age, and thus, our estimates of the number of cells per gram of tissue ma

> Most of the relevant data available in the literature were not stratified by sex and age, and thus, our estimates of the number of cells per gram of tissue mass (henceforth “cell density”) represent a broad normal range independent of sex and age. We use the cell density estimates to extrapolate our results to other segments of the population based on the reference mass of their tissues and organs (11). Thus we obtain a reference estimate for the immune cell population of healthy adult females weighing 60 kg and reference children of age 10 weighing 32 kg (11). Does that help? https://www.pnas.org/doi/10.1073/pnas.2308511120 https://www.pnas.org/doi/10.1073/pnas.2308511120