FILE .docx: contains tables and figures mentioned in the main text, plus some further details on MPs carachteristics and the new protocol for volume measurement. IMJ_Aanalysis_Macro: contains the Macro used for the image analysis. R_MPs_Volume_TESTS: contains the R code used to elaborate the data retrieved from the Image Analysis. It is suggested to make an INPUT-OUTPUT folder for IMJ_Analysis_Macro and then copy its content with R in another folder named according to the MPs group analyzed. This specific step is not present in the script as the choice is left to the user. R_custom_functions: containes the custom function written for the R_MPs_Volume_TESTS