Columbia subject headings:
Epidermis--Cytology--Research--Methodology.
Epidermis--Physiology--Research--Methodology.
Harvard subject headings:
Epidermis--Cytology--Research--Methodology.
Epidermis--Physiology--Research--Methodology.
Princeton subject headings:
Epidermis--Cytology--Research--Methodology.
Epidermis--Physiology--Research--Methodology.