OPT: add flag -output-type and -overwrite like in sct_extract_metric (only for mean CSA and volume estimations)
OPT: add flag -output-type and -overwrite like in sct_extract_metric (only for mean CSA and volume estimations)

3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox